EP1119662B1 - Plate which is suited as a noise protection wall - Google Patents

Plate which is suited as a noise protection wall Download PDF

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Publication number
EP1119662B1
EP1119662B1 EP99970138A EP99970138A EP1119662B1 EP 1119662 B1 EP1119662 B1 EP 1119662B1 EP 99970138 A EP99970138 A EP 99970138A EP 99970138 A EP99970138 A EP 99970138A EP 1119662 B1 EP1119662 B1 EP 1119662B1
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EP
European Patent Office
Prior art keywords
sheet
thread
plate
filaments
threads
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EP99970138A
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German (de)
French (fr)
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EP1119662A1 (en
Inventor
Egbert Schöla
Peter Seelmann
Gerald Molnar
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Roehm GmbH Darmstadt
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Roehm GmbH Darmstadt
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0023—Details, e.g. foundations
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0017—Plate-like elements

Definitions

  • the invention relates to noise protection elements suitable plates from per se fragile acrylic glass, which contain embedded for fragmentation in eventual breakage of the glass monofilament plastic threads.
  • Plates of the type mentioned above, which are secured against the formation and falling of loose fragments are known for example from EP 0 407 852.
  • the plates disclosed therein contain embedded, based on the plate cross section, approximately centrally monofilament plastic threads or a mesh fabric of such threads.
  • plastic threads monofilament threads made of polyamide are particularly well suited.
  • the embedded plastic threads are almost invisible, so that the view through the element is preserved.
  • an optimal protection against weathering is given. The cleaning of the panels is completely trouble-free, above all they are secured even at low temperatures (-20 ° C) against the formation and falling of loose fragments. It should be noted, however, that the central arrangement places a very high demand on the production of such plates.
  • an element according to EP 0 407 852 easily passes a test based on DIN 52 290, ie a corresponding plate that rests freely on two sides, is indeed on impact of falling from 9 m height steel ball with a mass of 4.1 kg Smashed, but there are no free fragments. In particular, all fragments formed are held together by the embedded threads.
  • US-A-5 040 352 discloses in Example 2 an acrylic sheet with an embedded "mesh fabric" of monofilaments with a diameter of 1.2 mm.
  • the maximum deflection must not lead to the fact that the thread comes to rest outside the plate, but in the context of the invention always ensures that the plastic threads are actually embedded.
  • the maximum deflection, or simply referred to as deflection of the plastic thread, can therefore according to the invention not be greater than the plate thickness reduced by the thread thickness, d. H. the diameter of the thread.
  • the deflection of the plastic thread according to the invention may in one embodiment be substantially perpendicular to the plane of the plate.
  • Such a design of the embedded threads can be achieved, for example, by embedding the threads in an acrylic molding compound for casting purposes under the influence of gravity according to a horizontal chamber method.
  • the deflection of the plastic threads is substantially parallel to the plane of the plate.
  • Such a configuration of the thread arrangement results, for example, informally in that the plates are cast according to the so-called Rostero method. In vertical chambers, as is usual according to this method, bend or hang the threads under the influence of gravity parallel to the plane of the plate.
  • the plate contains threads whose deflection is substantially perpendicular to the plane of the plate, and that the plate contains threads whose deflection is substantially parallel to the plane of the plate.
  • Such an arrangement of the securing threads is obtainable, for example, by using two threads of different lengths and therefore the one thread almost parallel to the glass surface, or the other thread has a deflection perpendicular to the plate plane.
  • two 15 mm plates, each with a vertical or parallel deflection to the glass surface stick together to form a 30 mm thick plate, and thus a plate according to the invention is obtained.
  • a special case consists of a rolled embedded polyamide thread, this has a particularly favorable fracture behavior. It makes sense to use a transparent polyamide thread here, otherwise the transparency of the plate is greatly reduced.
  • the threads may run substantially parallel to one of the surfaces of the plate.
  • the invention also makes it possible to embed threads in the polymer matrix which do not run parallel to a surface, but which are, for example, embedded transversely.
  • the thread ends of at least one thread have substantially the same distance to a surface in the plane of the plate and / or to one of the edges of the plate. If the aforementioned condition is fulfilled, the threads are embedded substantially parallel to a surface in the plane of the plate and / or to one of the edges of the plate.
  • embodiments may also be preferred in which the distance of the thread ends of at least one thread to a surface in the plane of the plate and / or to one of the edges of the plate is different. Precisely from the latter circumstance follows that the production of the noise protection elements according to the invention in comparison with the production of the elements according to the prior art has been significantly simplified, because much larger tolerances can be accepted, indeed may be desirable, without thereby suffer disadvantages in the fracture properties have to.
  • the embedded plastic filaments may be arranged to extend parallel to each other in only one direction, or to be parallel to each other in two or more directions.
  • the two directions form an angle of 90 ° or even an angle deviating from 90 °.
  • Monofilament threads of polyamide or polypropylene are particularly well suited as plastic threads, in particular because their adhesion to the surrounding acrylic glass is relatively low and thus there is no appreciable loss of tensile strength at any low temperatures.
  • the diameter of the monofilament threads is suitably between 0.2 and 2.0 mm.
  • the lateral distance between adjacent threads may be in the range between 8 and 100 mm. However, smaller and larger distances are also feasible.
  • At least parts of a thread or all threads can be dyed in high contrast.
  • black coloring can be used to design the Noise protection elements serve, on the other hand, the elements on the other hand can be protected from birds.
  • Plates according to the invention are made of acrylic glass and are made of materials known to those skilled in the art.
  • the plates may preferably be cast from methyl methacrylate syrup.
  • the size of the plates varies in the range of about 1 mx 2 m to 2 mx 3 m or even larger.
  • the thickness of the plates is approximately in the range of 5-30 mm, preferably 12-25 mm, in particular 15-20 mm.
  • the plates according to the invention have very good splinter-bonding properties, in particular at higher destruction rates or low temperatures. Particularly advantageous is an offset arrangement of the thread ends or a double-layered arrangement of the polyamide threads or a net-like sagging arrangement of the securing threads.
  • the plates thus described are outstandingly suitable for use as noise protection plates, in the railway or trans-rapid area, since particularly high destruction rates can occur here.
  • Another advantage of the plates according to the invention consists in one-sided clamping, so show the strongly sagging two layers or sagging networks excellent cohesion in contrast to the center-centered, parallel to the surface positioned polyamide thread board.
  • reference numeral 1 denotes a sheet of acrylic glass with embedded plastic threads.
  • Reference numeral 2 denotes the polymer matrix, while reference numeral 3 designates a polyamide thread.
  • FIG. 2 shows a further embodiment according to the invention, which also shows an identical distance of 4 and 4 'to the surface 5 or to the surface 6, but the distances to the two surfaces 5 and 6 are different from one another.
  • D. h. The thread shown is not centered, so not symmetrical, but the thread shown is embedded asymmetrically.
  • the embodiment shown in FIG. 3 is a thread "slanted" embedded in a polymer matrix.
  • the feature is met that the distance between the thread ends 4 and 4 'of a thread to one and the same surface in the plate plane (surfaces 5 or 6) is different.
  • FIG. 1 A further embodiment of the thread arrangements according to the invention is evidenced by FIG. These are two visible embedded threads 3 and 3 ', which are arranged alternately. That is, that one Thread 3 'is more "sagging" or “deflected” than the other thread 3 shown visibly. It is understood that the two threads 3 and 3' shown may be representative of a number of threads in the plate. In addition, it is clear that one of the threads can be embedded in about without significant deflection or without significant sagging, while the second illustrated thread (reference numeral 3 ') is relatively strongly deflected from the normal position. In Figure 4b, the position of the threads 3 and 3 'is explained in more detail by a section of Figure 4a.
  • FIG. 5 Yet another variant of the noise protection elements according to the invention is shown in FIG. 5. This is a multilayer arrangement of threads one above the other. These can be arranged directly one above the other hanging through, but there are also embodiments with multi-layered yarns belonging to the invention.
  • FIG. 6 also shows a further embodiment of the inventive arrangement of plastic threads, not only in cross section but also in plan view.
  • Figures 6a, b illustrate that a net-like arrangement of sagging threads is also possible.
  • FIG. 7 illustrates in cross-section in a further embodiment the maximum deflection of a thread. This is a maximum of the plate thickness reduced by the thread thickness.
  • Figure 8 Another embodiment is shown in Figure 8.
  • an embodiment is shown in cross section, in which the deflection varies from thread to thread. For example, with a plate thickness of about 20 mm, the maximum deflection increases from 1 mm for the most tensioned thread up to 19 mm for the thread with the maximum deflection.
  • FIG. 9 an embodiment which is possible within the scope of the invention is clarified.
  • a wavy arrangement of the thread can be seen.
  • FIG. 10 illustrates an embodiment in which the arrangement of the embedded plastic threads is such that they have a sag or maximum deflection which runs parallel to the plate plane. As already indicated, such an arrangement of the threads is readily available, for example, in the roster process.
  • a chamber was formed from two sheets of polished silicate glass, 2 ⁇ 3 m in size, with the aid of a 20 mm circumferential seal.
  • This chamber were clamped parallel to each other monofilament polyamide threads with a diameter of 2 mm at a distance of 30 mm.
  • the polyamide thread length was dimensioned such that a 5 mm polyamide thread sagging was achieved.
  • methyl methacrylate syrup containing a radical-forming initiator was charged into the chamber.
  • the filled chamber was placed in a water bath and the syrup was cured by supplying heat to a sheet of high molecular weight polymethylmethacrylate.
  • the chamber was polymerized lying, so that the deflection of the threads was perpendicular to the PMMA surface. After demoulding, this resulted in an approximately 2 x 3 m, 20 mm thick cast acrylic sheet with embedded polyamide filaments.
  • the positioning of the polyamide threads or the thread suspension was using a Ultrasonic echo sounder (10 megahertz measuring frequency) measured, the measuring head of the echosounder is equipped with a transmitter and a receiver, so as to measure the distance between PMMA surface and polyamide thread. In the middle of the plate a maximum sag of 4 mm was measured.
  • the plate thus obtained was subjected to a pendulum test.
  • a steel bulb of 400 kg is raised to 1.6 meters, destroying the plate.
  • the evaluation criterion is the occurrence of free fragments which are not larger than 25 cm 2 and have an angle of ⁇ 15 °.
  • the 2 x 3 m large slabs are installed on three sides in a steel frame construction. At each corner of the plate there is a hole at a distance of 15 cm, which serves as a safety catch, d. h., a steel cable is used which is pulled through the four holes of the acrylic sheet and attached to the frame construction.
  • This structure corresponds to the normal installation of a transparent noise barrier.
  • the distance from the acrylic glass plate to the energy dissipation wall is 1.24 m. Normally, the pear smashes the acrylic sheet and is then braked by this wooden wall.
  • the acrylic glass pane was destroyed with the "pear", which hits the plate from a height of 1.6 m.
  • the pear consists of two butt welded ball stumps.
  • the impact speed was 5.6 m per second, the energy 6.278 Joule.
  • the measurement was carried out both at 20 ° C and at -20 ° C; in both cases no free fragments appeared. For the fractional result it is irrelevant whether the thread deflection is in the direction of the destruction body or turned away from him.
  • Example 2 for producing a composite element
  • a chamber with 20 mm thick piping was built in the Rostero oven. Polyamide cords were inserted into this chamber at a distance of 30 mm, which had a deflection of 5 mm parallel to the surface. The diameter of the polyamide cords used was 2 mm.
  • This chamber thus prepared was filled with a radical-forming initiator-containing methyl methacrylate syrup. After filling, the chamber was evacuated and the polymerization started by heating to 50 ° C. Due to the vertical arrangement of the polymerization chamber, the polyamide cords hung parallel to the surface. After complete curing of the plate, this was removed from the mold and subjected to a fracture test. Both at -20 ° C and at +20 ° C, no free fragments were obtained.
  • Example 2 The procedure was as in Example 1, but with the difference that instead of the monofilament polyamide threads a polyamide mesh of monofilament threads with a diameter of 2 mm and a mesh size of 50 x 50 mm with a max. Suspension of 8 mm was made.
  • This plate had a thickness of 20 mm and was subjected to the pendulum test; the difference was that the plate was not built on three sides but one-sided. In the pendulum test at 20 ° C, no free fragments appeared on this plate either.
  • Example 1 The procedure was as in Example 1. The pendulum test was carried out with a height of 8 m. The impact speed was 12.53 meters per second, the energy 31,392 joules. There were no free fragments at 20 ° C. For the fractional result, it is irrelevant whether the thread deflection is turned away in the direction of the destruction body or from it.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

A plate utilizable in a noise protection wall of fragile acrylic glass comprising a plurality of side by side synthetic monofilament plastic threads for embedded in and running along the plate for splinter binding on breakage of the glass wherein, at least one thread has a maximum deviation of 1 mm or more from a theoretical straight line connecting the ends of said thread.

Description

Die Erfindung betrifft als Lärmschutzelemente geeignete Platten aus an sich zerbrechlichem Acrylglas, welche zur Splitterbindung bei eventuellem Bruch des Glases monofile Kunststofffäden eingebettet enthalten.The invention relates to noise protection elements suitable plates from per se fragile acrylic glass, which contain embedded for fragmentation in eventual breakage of the glass monofilament plastic threads.

Platten der eingangs genannten Art, welche gegen das Entstehen und Herabfallen von losen Bruchstücken gesichert sind, sind beispielsweise aus der EP 0 407 852 bekannt. Die darin offenbarten Platten enthalten eingebettet, bezogen auf den Plattenquerschnitt, etwa mittig monofile Kunststofffäden oder ein Gittergewebe aus solchen Fäden. Als Kunststofffäden sind monofile Fäden aus Polyamid besonders gut geeignet. In der genannten EP 0 407 852 wird hervorgehoben, dass die eingebetteten Kunststofffäden nahezu unsichtbar sind, so dass die Durchsicht durch das Element erhalten bleibt. Außerdem ist aufgrund der Tatsache, dass die Kunststofffäden im Inneren der Platte eingebettet sind, ein optimaler Schutz gegen Witterungseinflüsse gegeben. Die Reinigung der Platten ist völlig problemlos, vor allem sind sie auch bei niedrigen Temperaturen (-20 °C) noch gegen das Entstehen und Herabfallen von losen Bruchstücken gesichert. Es bleibt allerdings festzuhalten, dass die mittige Anordnung eine recht hohe Anforderung an die Fertigung solcher Platten stellt.Plates of the type mentioned above, which are secured against the formation and falling of loose fragments are known for example from EP 0 407 852. The plates disclosed therein contain embedded, based on the plate cross section, approximately centrally monofilament plastic threads or a mesh fabric of such threads. As plastic threads monofilament threads made of polyamide are particularly well suited. In the cited EP 0 407 852 it is emphasized that the embedded plastic threads are almost invisible, so that the view through the element is preserved. In addition, due to the fact that the plastic threads are embedded in the interior of the plate, an optimal protection against weathering is given. The cleaning of the panels is completely trouble-free, above all they are secured even at low temperatures (-20 ° C) against the formation and falling of loose fragments. It should be noted, however, that the central arrangement places a very high demand on the production of such plates.

Gemäß der EP 0 826 832 sind bruchsichere Lärmschutzplatten aus Acrylpolymeren bekannt, welche Filamente aus Kunststoffmaterial enthalten, wobei die Filamente nicht mittig angeordnet sind. Vielmehr sind die Filamente in einem Abstand zwischen 20 und 35 % der Gesamtdicke der Platte bezüglich derjenigen Oberfläche angeordnet, die der Oberfläche abgewandt ist, welche einem eventuellen Crash ausgesetzt ist. Gemäß Aussage der genannten EP 0 826 832 lassen sich überraschenderweise auch mit der nicht mittigen Anordnung bruchsichere Lärmschutzelemente erhalten. Allerdings bleibt festzustellen, dass die zur Glaubhaftmachung dieses behaupteten Effektes angewendeten Testmethoden relativ wenig aussagekräftig sind, da die ausgeübten Aufprallenergien nur in einem unzureichend hohen Bereich liegen. Demgegenüber besteht ein Element gemäß der EP 0 407 852 ohne weiteres einen Test in Anlehnung an DIN 52 290, d. h. eine entsprechende Platte, die zweiseitig frei aufliegt, wird bei Aufprall einer aus 9 m Höhe herabfallenden Stahlkugel mit einer Masse von 4,1 kg zwar zertrümmert, es entstehen jedoch keine freien Bruchstücke. Insbesondere werden alle entstandenen Bruchstücke durch die eingebetteten Fäden zusammengehalten.According to EP 0 826 832 shatter-proof noise protection plates made of acrylic polymers are known, which contain filaments of plastic material, wherein the filaments are not arranged centrally. Rather, the filaments are arranged at a distance of between 20 and 35% of the total thickness of the plate with respect to the surface facing away from the surface which is exposed to a possible crash. According to the said EP 0 826 832 can be surprisingly also with the non-central Arrangement shatterproof noise protection elements obtained. However, it remains to be said that the test methods used to substantiate this alleged effect are relatively insignificant, since the impact energies applied are only in an insufficiently high range. In contrast, an element according to EP 0 407 852 easily passes a test based on DIN 52 290, ie a corresponding plate that rests freely on two sides, is indeed on impact of falling from 9 m height steel ball with a mass of 4.1 kg Smashed, but there are no free fragments. In particular, all fragments formed are held together by the embedded threads.

US-A-5 040 352 offenbart im Beispiel 2 eine Acrylglasplatte mit einem eingebetteten "mesh fabric" aus Monofilamenten mit einem Durchmesser von 1,2 mm.US-A-5 040 352 discloses in Example 2 an acrylic sheet with an embedded "mesh fabric" of monofilaments with a diameter of 1.2 mm.

Erfindungsgemäß wurde nun unerwartet und überraschend gefunden, dass es möglich ist, gleichzeitig Bruchsicherung und Lärmschutz mit Hilfe von Platten der eingangs genannten Art zu erhalten, worin zumindest einer der eingebetteten Fäden eine maximale Auslenkung von 3 mm oder mehr von einer durch die Enden dieses Fadens gedachten geraden Linie aufweist.According to the invention, it has now unexpectedly and surprisingly been found that it is possible to simultaneously obtain breakage and noise protection with the aid of plates of the type mentioned above, wherein at least one of the embedded threads has a maximum deflection of 3 mm or more from an imaginary one through the ends of this thread straight line.

Diese gewissermaßen "durchhängende" Positionierung der Kunststofffäden in der Acrylglasmatrix führt unter bestimmten Umständen zu einem vorteilhafteren Verhalten der als Lärmschutzwand geeigneten erfindungsgemäßen Platten bei den einschlägigen Tests, wie sie z. B. gemäß ZTV-LSW 88 unter 3.4.2. und die Richtzeichnung LS3 des Bundesministers für Verkehr: "Zusätzliche Technische Vorschriften und Richtlinien für die Ausführung von Lärmschutzwänden an Straßen" zu durchlaufen sind. Mit maximaler Auslenkung ist im Sinne der Erfindung der größte Abstand des Fadens von einer gedachten Linie gemeint, welche sich zwischen den beiden Enden des jeweiligen Fadens ergibt. Weiters ist es noch mehr bevorzugt, wenn die maximale Auslenkung bei einer erfindungsgemäßen Platte 5 mm oder darüber beträgt.This somewhat "sagging" positioning of the plastic threads in the acrylic glass matrix leads under certain circumstances to a more advantageous behavior of the invention as a noise barrier wall according to the invention in the relevant tests, such as. In accordance with ZTV-LSW 88 under 3.4.2. and the guideline LS3 of the Federal Minister of Transport: "Additional technical regulations and guidelines for the execution of noise barriers on roads". With maximum deflection is meant for the purposes of the invention, the largest distance of the thread from an imaginary line, which results between the two ends of the respective thread. Furthermore, it is even more preferable if the maximum deflection in a plate according to the invention is 5 mm or more.

Die maximale Auslenkung darf dabei nicht dazu führen, dass der Faden außerhalb der Platte zu liegen kommt, vielmehr wird im Rahmen der Erfindung immer gewährleistet, dass die Kunststofffäden auch tatsächlich eingebettet sind. Die maximale Auslenkung, oder auch vereinfacht als Durchbiegung des Kunststofffadens bezeichnet, kann deswegen erfindungsgemäß nicht größer sein als Plattendicke vermindert um die Fadenstärke, d. h. den Durchmesser des Fadens.The maximum deflection must not lead to the fact that the thread comes to rest outside the plate, but in the context of the invention always ensures that the plastic threads are actually embedded. The maximum deflection, or simply referred to as deflection of the plastic thread, can therefore according to the invention not be greater than the plate thickness reduced by the thread thickness, d. H. the diameter of the thread.

Die Auslenkung des Kunststofffadens kann gemäß der Erfindung in einer Ausführungsform im Wesentlichen senkrecht zur Plattenebene sein. Eine solche Gestaltung der eingebetteten Fäden ist beispielsweise dadurch erzielbar, dass die Fäden unter dem Einfluss der Schwerkraft nach einem liegenden Kammerverfahren in eine Acrylglasformmasse zu Gießzwecken eingebettet werden.The deflection of the plastic thread according to the invention may in one embodiment be substantially perpendicular to the plane of the plate. Such a design of the embedded threads can be achieved, for example, by embedding the threads in an acrylic molding compound for casting purposes under the influence of gravity according to a horizontal chamber method.

Alternativ zu dieser Ausführungsform kann es auch bevorzugt sein, dass die Auslenkung der Kunststofffäden im Wesentlichen parallel zur Plattenebene ist. Eine solche Ausgestaltung der Fadenanordnung ergibt sich beispielsweise zwanglos dadurch, dass die Platten nach dem sogenannten Rostero-Verfahren gegossen werden. Bei senkrecht stehenden Kammern, wie es gemäß diesem Verfahren üblich ist, biegen sich oder hängen die Fäden unter dem Einfluss der Schwerkraft parallel zur Plattenebene durch.As an alternative to this embodiment, it may also be preferred that the deflection of the plastic threads is substantially parallel to the plane of the plate. Such a configuration of the thread arrangement results, for example, informally in that the plates are cast according to the so-called Rostero method. In vertical chambers, as is usual according to this method, bend or hang the threads under the influence of gravity parallel to the plane of the plate.

Noch eine zweckmäßige Ausführungsform der erfindungsgemäßen Platten sieht vor, dass die Platte Fäden enthält, deren Auslenkung im Wesentlichen senkrecht zur Plattenebene ist, und dass die Platte Fäden enthält, deren Auslenkung im Wesentlichen parallel zur Plattenebene ist. Eine solche Anordnung der Sicherungsfäden ist beispielsweise dadurch erhältlich, dass man zwei verschieden lange Fäden verwendet und deshalb der eine Faden nahezu parallel zur Glasoberfläche, bzw. der andere Faden eine Auslenkung senkrecht zur Plattenebene aufweist.
Auch lassen sich zwei 15 mm Platten mit jeweils senkrechter bzw. paralleler Auslenkung zur Glasoberfläche zu einer 30 mm starken Platte zusammenkleben, und damit wird eine erfindungsgemäße Platte erhalten.
Ein besonderer Fall besteht durch einen gerollt eingebetteten Polyamidfaden, dieser weist ein besonders günstiges Bruchverhalten auf. Sinnvoll ist es, hier einen transparenten Polyamidfaden zu verwenden, da sonst die Transparenz der Platte sehr stark reduziert ist.Yet another expedient embodiment of the plates according to the invention provides that the plate contains threads whose deflection is substantially perpendicular to the plane of the plate, and that the plate contains threads whose deflection is substantially parallel to the plane of the plate. Such an arrangement of the securing threads is obtainable, for example, by using two threads of different lengths and therefore the one thread almost parallel to the glass surface, or the other thread has a deflection perpendicular to the plate plane.
Also, two 15 mm plates, each with a vertical or parallel deflection to the glass surface stick together to form a 30 mm thick plate, and thus a plate according to the invention is obtained.
A special case consists of a rolled embedded polyamide thread, this has a particularly favorable fracture behavior. It makes sense to use a transparent polyamide thread here, otherwise the transparency of the plate is greatly reduced.

Je nach Vorgehensweise und Herstellung der erfindungsgemäßen Platten ist demnach eine annähernd beliebige Ausrichtung der Kunststofffäden in der Polymermatrix möglich. So kann neben einer senkrechten oder parallelen Anordnung zur Plattenebene auch eine Auslenkung erzielt werden, welche in freier Abstufung beliebig zwischen diesen Grenzwerten liegt.Depending on the procedure and production of the plates according to the invention, therefore, an almost arbitrary orientation of the plastic filaments in the polymer matrix is possible. Thus, in addition to a vertical or parallel arrangement to the plane of the plate, a deflection can also be achieved, which in arbitrary gradation lies arbitrarily between these limit values.

Gemäß der Erfindung können die Fäden im Wesentlichen parallel zu einer der Oberflächen der Platte verlaufen.According to the invention, the threads may run substantially parallel to one of the surfaces of the plate.

Darüber hinaus ermöglicht es die Erfindung auch, Fäden in die Polymermatrix einzubetten, die nicht parallel zu einer Oberfläche verlaufen, sondern die beispielsweise quer verlaufend eingebettet sind.In addition, the invention also makes it possible to embed threads in the polymer matrix which do not run parallel to a surface, but which are, for example, embedded transversely.

Dies bedeutet, dass im Hinblick auf die erste Variante in einer besonders günstigen Ausführungsform die Fadenenden wenigstens eines Fadens im Wesentlichen denselben Abstand zu einer Oberfläche in Plattenebene und/oder zu einer der Kanten der Platte aufweisen. Sofern die vorgenannte Bedingung erfüllt ist, sind die Fäden im Wesentlichen parallel zu einer Oberfläche in Plattenebene und/oder zu einer der Kanten der Platte eingebettet.This means that with regard to the first variant, in a particularly favorable embodiment, the thread ends of at least one thread have substantially the same distance to a surface in the plane of the plate and / or to one of the edges of the plate. If the aforementioned condition is fulfilled, the threads are embedded substantially parallel to a surface in the plane of the plate and / or to one of the edges of the plate.

Alternativ dazu können im Hinblick auf die zweite Variante auch Ausführungsformen bevorzugt sein, worin der Abstand der Fadenenden wenigstens eines Fadens zu einer Oberfläche in Plattenebene und/oder zu einer der Kanten der Platte verschieden ist. Gerade aus letztgenanntem Umstand folgt, dass die Fertigung der erfindungsgemäßen Lärmschutzelemente im Vergleich zu der Fertigung der Elemente gemäß dem Stand der Technik sich deutlich vereinfacht hat, weil erheblich größere Toleranzen hingenommen werden können, ja erwünscht sein können, ohne hierdurch bei den Brucheigenschaften Nachteile erleiden zu müssen.Alternatively, with regard to the second variant, embodiments may also be preferred in which the distance of the thread ends of at least one thread to a surface in the plane of the plate and / or to one of the edges of the plate is different. Precisely from the latter circumstance follows that the production of the noise protection elements according to the invention in comparison with the production of the elements according to the prior art has been significantly simplified, because much larger tolerances can be accepted, indeed may be desirable, without thereby suffer disadvantages in the fracture properties have to.

Grundsätzlich gesehen, können die eingebetteten Kunststofffäden so angeordnet sein, dass sie parallel zueinander in nur einer Richtung verlaufen, oder so, dass sie jeweils parallel zueinander in zwei oder mehr Richtungen verlaufen. Hierbei ist es im letztgenannten Fall ü. a. möglich, dass die beiden Richtungen einen Winkel von 90° oder auch einen von 90° abweichenden Winkel bilden.Generally speaking, the embedded plastic filaments may be arranged to extend parallel to each other in only one direction, or to be parallel to each other in two or more directions. Here it is in the latter case ü. a. possible that the two directions form an angle of 90 ° or even an angle deviating from 90 °.

Als Kunststofffäden sind monofile Fäden aus Polyamid oder Polypropylen besonders gut geeignet, insbesondere weil deren Haftung zu dem sie umgebenden Acrylglas relativ gering ist und somit auch bei eventuellen tiefen Temperaturen kein nennenswerter Verlust der Reißfestigkeit gegeben ist. Beim Bruch des Acrylglases können sich die monofilen Kunststofffäden dehnen und zerreißen infolgedessen nicht oder allenfalls zu einem geringen Teil und halten dadurch die entstehenden Bruchstücke zusammen. Der Durchmesser der monofilen Fäden liegt zweckmäßigerweise zwischen 0,2 und 2,0 mm. Der seitliche Abstand zwischen benachbarten Fäden kann im Bereich zwischen 8 und 100 mm liegen. Es sind jedoch auch kleinere und größere Abstände realisierbar.Monofilament threads of polyamide or polypropylene are particularly well suited as plastic threads, in particular because their adhesion to the surrounding acrylic glass is relatively low and thus there is no appreciable loss of tensile strength at any low temperatures. When breaking the acrylic glass, the monofilament plastic threads can stretch and tear as a result, or at best to a small extent and thereby hold the resulting fragments together. The diameter of the monofilament threads is suitably between 0.2 and 2.0 mm. The lateral distance between adjacent threads may be in the range between 8 and 100 mm. However, smaller and larger distances are also feasible.

Zusätzlich können zumindest Teile eines Fadens oder auch alle Fäden kontrastreich eingefärbt sein. Diese beispielsweise schwarze Einfärbung kann zur Gestaltung der Lärmschutzelemente dienen, andererseits können hierdurch auch die Elemente vor Vögeln geschützt werden.In addition, at least parts of a thread or all threads can be dyed in high contrast. This example, black coloring can be used to design the Noise protection elements serve, on the other hand, the elements on the other hand can be protected from birds.

Platten gemäß der Erfindung bestehen aus Acrylglas und werden aus dem Fachmann an sich bekannten Materialien gefertigt. So können die Platten vorzugsweise aus Methylmethacrylat-Sirup gegossen werden. Die Größe der Platten variiert im Bereich von etwa 1 m x 2 m bis 2 m x 3 m oder auch größer.
Die Dicke der Platten liegt etwa im Bereich von 5-30 mm, vorzugsweise 12-25 mm, insbesondere 15-20 mm.Plates according to the invention are made of acrylic glass and are made of materials known to those skilled in the art. Thus, the plates may preferably be cast from methyl methacrylate syrup. The size of the plates varies in the range of about 1 mx 2 m to 2 mx 3 m or even larger.
The thickness of the plates is approximately in the range of 5-30 mm, preferably 12-25 mm, in particular 15-20 mm.

Die erfindungsgemäßen Platten zeichnen sich durch eine ganze Reihe von besonders vorteilhaften Eigenschaften aus:The plates according to the invention are distinguished by a whole series of particularly advantageous properties:

Die erfindungsgemäßen Platten weisen sehr gute Splitterbindungseigenschaften, insbesondere bei höheren Zerstörungsgeschwindigkeiten oder tiefen Temperaturen, auf. Besonders vorteilhaft ist eine versetzte Anordnung der Fadenenden oder eine doppellagige Anordnung der Polyamidfäden bzw. eine netzartige durchhängende Anordnung der Sicherungsfäden.The plates according to the invention have very good splinter-bonding properties, in particular at higher destruction rates or low temperatures. Particularly advantageous is an offset arrangement of the thread ends or a double-layered arrangement of the polyamide threads or a net-like sagging arrangement of the securing threads.

Die so beschriebenen Platten eignen sich in hervorragender Weise für den Einsatz als Lärmschutzplatten, im Eisenbahn- bzw. Trans-Rapid-Bereich, da hier besonders hohe Zerstörungsgeschwindigkeiten auftreten können. Ein weiterer Vorteil der erfindungsgemäßen Platten besteht bei einseitiger Einspannung, so zeigen die stark durchhängenden Zweilagen oder durchhängenden Netzwerke einen exzellenten Zusammenhalt im Gegensatz zur mittig zentrierten, parallel zur Oberfläche positionierten Polyamidfadenplatte.The plates thus described are outstandingly suitable for use as noise protection plates, in the railway or trans-rapid area, since particularly high destruction rates can occur here. Another advantage of the plates according to the invention consists in one-sided clamping, so show the strongly sagging two layers or sagging networks excellent cohesion in contrast to the center-centered, parallel to the surface positioned polyamide thread board.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Verweis auf die beigefügten Figuren eingehender erläutert.The invention will be explained in more detail by means of embodiments with reference to the accompanying figures.

In den Figuren zeigen

Fig. 1
einen Querschnitt durch ein Lärmschutzelement mit einer ersten erfindungsgemäßen Fadenanordnung;
Fig. 2
einen Querschnitt durch ein Lärmschutzelement mit einer zweiten erfindungsgemäßen Fadenanordnung;
Fig. 3
einen Querschnitt durch ein Lärmschutzelement mit einer dritten erfindungsgemäßen Fadenanordnung;
Fig. 4a, b
einen Querschnitt durch ein Lärmschutzelement mit einer vierten erfindungsgemäßen Fadenanordnung sowie einen Schnitt aus 4a;
Fig. 5a, b
einen Querschnitt durch ein Lärmschutzelement mit einer fünften erfindungsgemäßen Fadenanordnung sowie einen Schnitt aus 5a;
Fig. 6a, b
einen Querschnitt durch ein Lärmschutzelement mit einer sechsten erfindungsgemäßen Fadenanordnung sowie einen Schnitt aus 6a;
Fig. 7
einen Querschnitt durch ein Lärmschutzelement mit einer siebten erfindungsgemäßen Fadenanordnung;
Fig. 8
einen Querschnitt durch ein Lärmschutzelement mit einer achten erfindungsgemäßen Fadenanordnung;
Fig. 9
einen Querschnitt durch ein Lärmschutzelement mit einer neunten erfindungsgemäßen Fadenanordnung; und
Fig. 10
in perspektivischer Aufsicht eine nach dem Rosteroprozess hergestellte Platte mit senkrecht zur Plattenebene ausgelenkten eingebetteten Kunststofffäden.
In the figures show
Fig. 1
a cross section through a noise protection element with a first thread assembly according to the invention;
Fig. 2
a cross section through a noise protection element with a second thread assembly according to the invention;
Fig. 3
a cross section through a noise protection element with a third thread assembly according to the invention;
Fig. 4a, b
a cross section through a noise protection element with a fourth thread arrangement according to the invention and a section of 4a;
Fig. 5a, b
a cross section through a noise protection element with a fifth thread arrangement according to the invention and a section of 5a;
Fig. 6a, b
a cross section through a noise protection element with a sixth thread assembly according to the invention and a section of 6a;
Fig. 7
a cross section through a noise protection element with a seventh thread assembly according to the invention;
Fig. 8
a cross section through a noise protection element with a eighth thread assembly according to the invention;
Fig. 9
a cross section through a noise protection element with a ninth thread assembly according to the invention; and
Fig. 10
in a perspective plan view of a prepared by the Rosteroprocess plate with deflected perpendicular to the plate plane embedded plastic threads.

In Figur 1 bedeutet das Bezugszeichen 1 eine Platte aus Acrylglas mit eingebetteten Kunststofffäden. Bezugszeichen 2 meint die Polymermatrix, während Bezugszeichen 3 einen Polyamidfaden bezeichnet. 4 und 4' kennzeichnen Fadenanfang und -ende. Der Abstand von Fadenanfang und Fadenende zur Oberfläche 5 ist gleich groß, ebenso wie der Abstand von Fadenanfang und Fadenende zu der Oberfläche 6. Man erkennt, dass der Faden 3 auf halber Strecke zwischen Fadenanfang 4 und Fadenende 4' eine maximale Auslenkung, d. h. Abweichung von der gedachten Verbindungslinie, d. h. der Geraden zwischen 4 und 4', aufweist.In Fig. 1, reference numeral 1 denotes a sheet of acrylic glass with embedded plastic threads. Reference numeral 2 denotes the polymer matrix, while reference numeral 3 designates a polyamide thread. 4 and 4 'mark thread beginning and end. The distance from the thread beginning and end of the thread to the surface 5 is the same, as well as the distance from the thread beginning and end of the thread to the surface 6. It can be seen that the thread 3 halfway between the thread beginning 4 and thread end 4 'a maximum deflection, d. H. Deviation from the imaginary connecting line, d. H. the straight line between 4 and 4 ', has.

In Figur 2 ist eine weitere erfindungsgemäße Ausführungsform zu erkennen, welche zwar auch einen identischen Abstand von 4 und 4' zu der Oberfläche 5 bzw. zu der Oberfläche 6 zeigt, allerdings sind die Abstände zu den beiden Oberflächen 5 und 6 voneinander verschieden. D. h., der gezeigte Faden ist nicht mittig, also nicht symmetrisch, vielmehr ist der gezeigte Faden unsymmetrisch eingebettet.FIG. 2 shows a further embodiment according to the invention, which also shows an identical distance of 4 and 4 'to the surface 5 or to the surface 6, but the distances to the two surfaces 5 and 6 are different from one another. D. h., The thread shown is not centered, so not symmetrical, but the thread shown is embedded asymmetrically.

Bei der in Figur 3 dargestellten Ausführungsform handelt es sich um einen "schräg" in eine Polymermatrix eingebetteten Faden. Hier wird insbesondere das Merkmal erfüllt, dass der Abstand der Fadenenden 4 und 4' eines Fadens zu ein und derselben Oberfläche in Plattenebene (Flächen 5 oder 6) verschieden ist.The embodiment shown in FIG. 3 is a thread "slanted" embedded in a polymer matrix. Here, in particular, the feature is met that the distance between the thread ends 4 and 4 'of a thread to one and the same surface in the plate plane (surfaces 5 or 6) is different.

Eine weitere Ausgestaltung der erfindungsgemäßen Fadenanordnungen wird durch die Figur 4 belegt. Hierbei handelt es sich um zwei sichtbar eingebettete Fäden 3 und 3', welche alternierend angeordnet sind. D. h., dass ein Faden 3' stärker "durchhängt" oder "ausgelenkt" ist als der andere sichtbar dargestellte Faden 3. Es versteht sich, dass die beiden dargestellten Fäden 3 und 3' stellvertretend für eine Reihe von Fäden in der Platte sein können. Außerdem ist klar, dass auch einer der Fäden in etwa ohne nennenswerte Auslenkung oder ohne nennenswertes Durchhängen eingebettet sein kann, während der zweite dargestellte Faden (Bezugszeichen 3') relativ stark aus der Normallage ausgelenkt ist. In Figur 4b wird die Lage der Fäden 3 und 3' durch einen Schnitt aus Figur 4a näher erläutert.A further embodiment of the thread arrangements according to the invention is evidenced by FIG. These are two visible embedded threads 3 and 3 ', which are arranged alternately. That is, that one Thread 3 'is more "sagging" or "deflected" than the other thread 3 shown visibly. It is understood that the two threads 3 and 3' shown may be representative of a number of threads in the plate. In addition, it is clear that one of the threads can be embedded in about without significant deflection or without significant sagging, while the second illustrated thread (reference numeral 3 ') is relatively strongly deflected from the normal position. In Figure 4b, the position of the threads 3 and 3 'is explained in more detail by a section of Figure 4a.

Noch eine weitere Variante der erfindungsgemäßen Lärmschutzelemente zeigt Figur 5. Hierin handelt es sich um eine mehrlagige Anordnung von Fäden übereinander. Diese können direkt übereinander durchhängend angeordnet sein, es sind allerdings auch Ausführungsformen mit mehrlagig versetzten Fäden zur Erfindung gehörig.Yet another variant of the noise protection elements according to the invention is shown in FIG. 5. This is a multilayer arrangement of threads one above the other. These can be arranged directly one above the other hanging through, but there are also embodiments with multi-layered yarns belonging to the invention.

Ebenso wie in den vorhergehenden Figuren 4a,b und 5a,b zeigt auch die Figur 6 nicht nur im Querschnitt sondern auch in der Draufsicht eine weitere Ausgestaltung der erfindungsgemäßen Anordnung von Kunststofffäden. Die Abbildungen 6a,b verdeutlichen, dass auch eine netzförmige Anordnung von durchhängenden Fäden möglich ist.As in the preceding FIGS. 4a, b and 5a, b, FIG. 6 also shows a further embodiment of the inventive arrangement of plastic threads, not only in cross section but also in plan view. Figures 6a, b illustrate that a net-like arrangement of sagging threads is also possible.

Die Figur 7 verdeutlicht im Querschnitt bei einer weiteren Ausführungsform die maximale Durchbiegung eines Fadens. Diese beträgt maximal die Plattendicke vermindert um die Fadendicke.FIG. 7 illustrates in cross-section in a further embodiment the maximum deflection of a thread. This is a maximum of the plate thickness reduced by the thread thickness.

Noch eine Ausführungsform ist der Abbildung 8 zu entnehmen. Hier wird im Querschnitt eine Ausführungsform gezeigt, bei welcher die Auslenkung von Faden zu Faden variiert. Die maximale Auslenkung nimmt beispielsweise bei einer Plattendicke von etwa 20 mm von 1 mm beim am meisten gespannten Faden bis zu 19 mm bei demjenigen Faden mit der maximalen Durchbiegung zu.Another embodiment is shown in Figure 8. Here, an embodiment is shown in cross section, in which the deflection varies from thread to thread. For example, with a plate thickness of about 20 mm, the maximum deflection increases from 1 mm for the most tensioned thread up to 19 mm for the thread with the maximum deflection.

Schließlich wird gemäß Figur 9 noch eine im Rahmen der Erfindung mögliche Ausführungsform verdeutlicht. Im Querschnitt ist eine wellenförmige Anordnung des Fadens zu erkennen.Finally, according to FIG. 9, an embodiment which is possible within the scope of the invention is clarified. In cross section, a wavy arrangement of the thread can be seen.

Schließlich verdeutlicht die Figur 10 eine Ausführungsform, bei welcher die Anordnung der eingebetteten Kunststofffäden so ist, dass diese eine Durchhängung oder maximale Auslenkung aufweisen, welche parallel zur Plattenebene verläuft. Wie bereits angedeutet, ist eine solche Anordnung der Fäden beispielsweise beim Rosteroprozess ohne weiteres erhältlich.Finally, FIG. 10 illustrates an embodiment in which the arrangement of the embedded plastic threads is such that they have a sag or maximum deflection which runs parallel to the plate plane. As already indicated, such an arrangement of the threads is readily available, for example, in the roster process.

Nachfolgende Beispiele belegen die vorteilhaften Eigenschaften der erfindungsgemäßen Lärmschutzelemente.The following examples prove the advantageous properties of the noise protection elements according to the invention.

Beispiel 1:Example 1:

Zur Herstellung einer Acrylglasplatte gemäß Figur 1 wurde aus zwei 2 x 3 m großen Platten aus poliertem Silikatglas mit Hilfe einer 20 mm umlaufenden Dichtung eine Kammer gebildet. In diese Kammer wurden in einem Abstand von jeweils 30 mm parallel zueinander monofile Polyamidfäden mit einem Durchmesser von 2 mm eingespannt. Die Polyamidfadenlänge wurde so bemessen, dass eine Durchhängung des Polyamidfadens von 5 mm realisiert wurde. Danach wurde in die Kammer Methylmethacrylatsirup, der einen radikalbildenden Initiator erhielt, eingefüllt. Die gefüllte Kammer wurde in ein Wasserbad gebracht, und der Sirup wurde durch Wärmezufuhr zu einer Platte aus hochmolekularem Polymethylmethacrylat ausgehärtet. Die Kammer wurde liegend polymerisiert, so dass die Auslenkung der Fäden senkrecht zur PMMA-Oberfläche erfolgte. Nach dem Entformen ergab das eine etwa 2 x 3 m große und 20 mm dicke gegossene Acrylglasplatte mit eingebetteten Polyamidfäden. Die Positionierung der Polyamidfäden bzw. der Fadendurchhängung wurde mit Hilfe eines Ultraschallecholotes (10 Megahertz Messfrequenz) vermessen, der Messkopf des Echolotes ist mit einem Sender und mit einem Empfänger ausgerüstet, um so den Abstand zwischen PMMA-Oberfläche und Polyamidfaden zu messen. In der Mitte der Platte wurde eine maximale Durchhängung von 4 mm gemessen.To produce an acrylic sheet according to FIG. 1, a chamber was formed from two sheets of polished silicate glass, 2 × 3 m in size, with the aid of a 20 mm circumferential seal. In this chamber were clamped parallel to each other monofilament polyamide threads with a diameter of 2 mm at a distance of 30 mm. The polyamide thread length was dimensioned such that a 5 mm polyamide thread sagging was achieved. Thereafter, methyl methacrylate syrup containing a radical-forming initiator was charged into the chamber. The filled chamber was placed in a water bath and the syrup was cured by supplying heat to a sheet of high molecular weight polymethylmethacrylate. The chamber was polymerized lying, so that the deflection of the threads was perpendicular to the PMMA surface. After demoulding, this resulted in an approximately 2 x 3 m, 20 mm thick cast acrylic sheet with embedded polyamide filaments. The positioning of the polyamide threads or the thread suspension was using a Ultrasonic echo sounder (10 megahertz measuring frequency) measured, the measuring head of the echosounder is equipped with a transmitter and a receiver, so as to measure the distance between PMMA surface and polyamide thread. In the middle of the plate a maximum sag of 4 mm was measured.

Die so erhaltene Platte wurde einem Pendelversuch unterzogen. Im Prinzip wird zur Durchführung dieses Testes eine Stahlbirne von 400 kg auf 1,6 Meter angehoben und damit die Platte zerstört. Als Beurteilungskriterium dient das Auftreten von freien Bruchstücken, die nicht größer als 25 cm2 sind und einen Winkel von <15° aufweisen.The plate thus obtained was subjected to a pendulum test. In principle, to carry out this test, a steel bulb of 400 kg is raised to 1.6 meters, destroying the plate. The evaluation criterion is the occurrence of free fragments which are not larger than 25 cm 2 and have an angle of <15 °.

Durchführung des Pendelversuches:Execution of the pendulum test:

Die 2 x 3 m großen Platten werden dreiseitig in eine Stahlrahmenkonstruktion eingebaut. An jeder Ecke der Platte befindet sich in einem Abstand von 15 cm ein Loch, das zur Aufnahme der Fangsicherung dient, d. h., es wird ein Stahlseil verwendet, das durch die vier Löcher der Acrylglasplatte gezogen wird und an der Rahmenkonstruktion befestigt ist. Dieser Aufbau entspricht der normalen Montage einer transparenten Lärmschutzwand. Der Abstand von der Acrylglasplatte bis zur Energieverzehrwand beträgt 1,24 m. Im Normalfall zerschlägt die Birne die Acrylglasplatte und wird dann durch diese Holzwand gebremst.The 2 x 3 m large slabs are installed on three sides in a steel frame construction. At each corner of the plate there is a hole at a distance of 15 cm, which serves as a safety catch, d. h., a steel cable is used which is pulled through the four holes of the acrylic sheet and attached to the frame construction. This structure corresponds to the normal installation of a transparent noise barrier. The distance from the acrylic glass plate to the energy dissipation wall is 1.24 m. Normally, the pear smashes the acrylic sheet and is then braked by this wooden wall.

Die Acrylglasscheibe wurde mit der "Birne", die aus 1,6 m Höhe auf die Platte trifft, zerstört. Die Birne besteht aus zwei stumpf verschweißten Kugelstümpfen. Die Aufprallgeschwindigkeit betrug 5,6 m pro Sekunde, die Energie 6.278 Joule. Die Messung wurde sowohl bei 20 °C als auch bei -20 °C durchgeführt; in beiden Fällen traten keine freien Bruchstücke auf. Für das Bruchergebnis ist es unerheblich, ob die Fadenauslenkung in Richtung Zerstörungskörper oder von ihm abgewendet ist.The acrylic glass pane was destroyed with the "pear", which hits the plate from a height of 1.6 m. The pear consists of two butt welded ball stumps. The impact speed was 5.6 m per second, the energy 6.278 Joule. The measurement was carried out both at 20 ° C and at -20 ° C; in both cases no free fragments appeared. For the fractional result it is irrelevant whether the thread deflection is in the direction of the destruction body or turned away from him.

Beispiel 2 zur Herstellung eines Verbundelementes:Example 2 for producing a composite element:

Gemäß Figur 10 wurde im Rostero-Ofen eine Kammer mit 20 mm dickem Keder gebaut. In diese Kammer wurden im Abstand von 30 mm Polyamidschnüre eingelegt, die parallel zur Oberfläche eine Durchbiegung von 5 mm aufwiesen. Der Durchmesser der verwendeten Polyamidschnüre betrug 2 mm. Diese so hergestellte Kammer wurde mit einem radikalbildenden Initiator enthaltenden Methylmethacrylatsirup gefüllt. Nach dem Befüllen wurde die Kammer evakuiert und durch Aufheizen auf 50 °C die Polymerisation gestartet. Durch die vertikale Anordnung der Polymerisationskammer hingen die Polyamidschnüre parallel zur Oberfläche durch. Nach vollständiger Aushärtung der Platte wurde diese entformt und einem Bruchtest unterzogen. Sowohl bei -20 °C als auch bei +20 °C wurden keine freien Bruchstücke erhalten.According to FIG. 10, a chamber with 20 mm thick piping was built in the Rostero oven. Polyamide cords were inserted into this chamber at a distance of 30 mm, which had a deflection of 5 mm parallel to the surface. The diameter of the polyamide cords used was 2 mm. This chamber thus prepared was filled with a radical-forming initiator-containing methyl methacrylate syrup. After filling, the chamber was evacuated and the polymerization started by heating to 50 ° C. Due to the vertical arrangement of the polymerization chamber, the polyamide cords hung parallel to the surface. After complete curing of the plate, this was removed from the mold and subjected to a fracture test. Both at -20 ° C and at +20 ° C, no free fragments were obtained.

Beispiel 3:Example 3:

Es wurde so verfahren wie im Beispiel 1, nur mit dem Unterschied, dass anstelle der monofilen Polyamidfäden ein Polyamidgitter aus monofilen Fäden mit einem Durchmesser von 2 mm und einer Maschenweite von 50 x 50 mm mit einer max. Durchhängung von 8 mm hergestellt wurde. Diese Platte wies eine Dicke von 20 mm auf und wurde dem Pendelversuch unterzogen; der Unterschied bestand darin, dass die Platte nicht dreiseitig sondern einseitig aufgebaut wurde. Beim Pendeltest bei 20 °C traten auch bei dieser Platte keine freien Bruchstücke auf.The procedure was as in Example 1, but with the difference that instead of the monofilament polyamide threads a polyamide mesh of monofilament threads with a diameter of 2 mm and a mesh size of 50 x 50 mm with a max. Suspension of 8 mm was made. This plate had a thickness of 20 mm and was subjected to the pendulum test; the difference was that the plate was not built on three sides but one-sided. In the pendulum test at 20 ° C, no free fragments appeared on this plate either.

Beispiel 4:Example 4:

Es wurde so verfahren wie im Beispiel 1. Der Pendeltest wurde mit einer Höhe von 8 m durchgeführt. Die Aufprallgeschwindigkeit betrug 12,53 m pro Sekunde, die Energie 31.392 Joule. Es traten keine freien Bruchstücke bei 20 °C auf. Für das Bruchergebnis ist es unerheblich, ob die Fadenauslenkung in Richtung Zerstörungskörper oder von ihm abgewendet ist.The procedure was as in Example 1. The pendulum test was carried out with a height of 8 m. The impact speed was 12.53 meters per second, the energy 31,392 joules. There were no free fragments at 20 ° C. For the fractional result, it is irrelevant whether the thread deflection is turned away in the direction of the destruction body or from it.

Claims (14)

  1. Sheet (1) of intrinsically frangible acrylic glass, which sheet is suitable for use as a anti-noise protection wall and which contains embedded monofilamentary plastics filaments (3, 3') to retain splinters should the glass fracture, characterised in that at least one filament (3, 3') has a maximum deflection of 3 mm or more from an imaginary straight line through the ends (4, 4') of the said filament.
  2. Sheet (1) according to claim 1, characterised in that the maximum deflection is 5 mm or more
  3. Sheet (1) according to one of the foregoing claims, characterised in that the deflection is substantially perpendicular to the plane of the sheet.
  4. Sheet (1) according to either of claims 1 and 2, characterised in that the deflection is substantially parallel to the plane of the sheet.
  5. Sheet (1) according to either of claims 1 and 2, characterised in that the sheet (1) contains filaments (3, 3') whose deflection is substantially perpendicular to the plane of the sheet, and filaments (3, 3') whose deflection is substantially parallel to the plane of the sheet.
  6. Sheet (1) according to one of the foregoing claims, characterised in that the ends (4, 4') of at least one filament (3, 3') are at substantially the same distances from one and the same surface (5) in the plane of the sheet and/or from one and the same edge of the sheet.
  7. Sheet (1) according to one of claims 1 to 5, characterised in that the distances of the ends (4, 4') of at least one filament (3, 3') from one and the same surface (5) in the plane of the sheet and/or from one and the same edge of the sheet are different.
  8. Sheet (1) according to one of the foregoing claims, characterised in that the embedded filaments (3, 3') extend substantially parallel to one another in one direction.
  9. Sheet (1) according to one of the foregoing claims 1 to 7, characterised in that the embedded filaments (3, 3') extend parallel to one another in respective ones of two directions.
  10. Sheet (1) according to claim 9, characterised in that the two directions make an angle of approximately 90°.
  11. Sheet (1) according to claim 9, characterised in that the two directions make an angle of other than 90°.
  12. Sheet (1) according to one of the foregoing claims, characterised in that the plastics filaments (3, 3') are monofilamentary filaments of polyamide of a diameter of 0.2 to 2 mm.
  13. Sheet (1) according to one of the foregoing claims, characterised in that the plastics filaments (3, 3') extend at a lateral spacing of 8 to 100 mm.
  14. Sheet (1) according to one of the foregoing claims, characterised in that at least one part of a filament (3, 3') is coloured to give a high contrast, in order in this way to be used for styling the elements and/or to provide anti-bird protection.
EP99970138A 1998-10-06 1999-09-22 Plate which is suited as a noise protection wall Expired - Lifetime EP1119662B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19846024 1998-10-06
DE19846024 1998-10-06
PCT/EP1999/007058 WO2000020690A1 (en) 1998-10-06 1999-09-22 Plate which is suited as a noise protection wall

Publications (2)

Publication Number Publication Date
EP1119662A1 EP1119662A1 (en) 2001-08-01
EP1119662B1 true EP1119662B1 (en) 2006-06-21

Family

ID=7883583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99970138A Expired - Lifetime EP1119662B1 (en) 1998-10-06 1999-09-22 Plate which is suited as a noise protection wall

Country Status (10)

Country Link
US (1) US6412597B1 (en)
EP (1) EP1119662B1 (en)
JP (1) JP4236816B2 (en)
AT (1) ATE331084T1 (en)
AU (1) AU5981299A (en)
DE (2) DE59913607D1 (en)
DK (1) DK1119662T3 (en)
ES (1) ES2263297T3 (en)
PT (1) PT1119662E (en)
WO (1) WO2000020690A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936035A1 (en) 2006-12-22 2008-06-25 Akripol proizvodnja in predelava polimerov, d.d. Panels with antinoise and antifragmentation properties on the basis of acrylic glass, process for their preparation and use thereof
EP2434055A1 (en) 2010-09-23 2012-03-28 Akripol proizvodnja in predelava polimerov, d.d. The fibre-reinforced acrylic panel and the process for its manufacture
WO2017155477A1 (en) 2016-03-06 2017-09-14 Akripol Proizvodnja In Predelava Polimerov, D.O.O. Method for panel manufacturing, particularly anti-noise

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DE10201411C1 (en) * 2002-01-15 2003-04-03 Roehm Gmbh Noise-damping retaining system with metal wire embedded in transparent acrylic glass panel, useful as noise-protection barrier, e.g. for bridge or multistory car park, has plastics layer between wire and matrix
EP1445381A1 (en) * 2003-02-06 2004-08-11 Placo S.r.l. Noise-suppression barrier
US20060205845A1 (en) * 2004-03-20 2006-09-14 Roehm Gbmh & Co. Kg Depolymerization method and device
EP1889975A1 (en) * 2006-08-16 2008-02-20 Calenberg Ingenieure planmässig elastisch lagern GmbH Sound-proofing device
PL2619370T3 (en) * 2010-09-21 2016-05-31 Plazit Iberica Plastic Solutions S A Reinforced acrylic glass panels
US9091069B2 (en) * 2012-10-10 2015-07-28 Aus Group Alliance Pty Ltd Plastic wall panel
AU2013273747B2 (en) 2013-12-20 2015-11-26 Aus Group Alliance Pty Ltd Plastic panel and structures using the same
EP3336256A1 (en) 2016-12-19 2018-06-20 Evonik Röhm GmbH Transparent sound absorbing acoustic baffling element
EP3592919A4 (en) 2017-03-09 2021-01-13 AUS Group Alliance Pty Ltd. Moulded cladding panel
US11608601B2 (en) 2017-04-27 2023-03-21 Aus Group Alliance Pty Ltd Sound attenuation barrier with improved ease of assembly

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CH684206A5 (en) * 1990-11-12 1994-07-29 Matec Holding Disposable heat shield.
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Publication number Priority date Publication date Assignee Title
EP1936035A1 (en) 2006-12-22 2008-06-25 Akripol proizvodnja in predelava polimerov, d.d. Panels with antinoise and antifragmentation properties on the basis of acrylic glass, process for their preparation and use thereof
EP2434055A1 (en) 2010-09-23 2012-03-28 Akripol proizvodnja in predelava polimerov, d.d. The fibre-reinforced acrylic panel and the process for its manufacture
WO2017155477A1 (en) 2016-03-06 2017-09-14 Akripol Proizvodnja In Predelava Polimerov, D.O.O. Method for panel manufacturing, particularly anti-noise

Also Published As

Publication number Publication date
ATE331084T1 (en) 2006-07-15
DK1119662T3 (en) 2006-10-16
DE59913607D1 (en) 2006-08-03
JP2002526802A (en) 2002-08-20
WO2000020690A1 (en) 2000-04-13
PT1119662E (en) 2006-11-30
EP1119662A1 (en) 2001-08-01
JP4236816B2 (en) 2009-03-11
AU5981299A (en) 2000-04-26
US6412597B1 (en) 2002-07-02
ES2263297T3 (en) 2006-12-01
DE19947704A1 (en) 2000-04-13
DE19947704B4 (en) 2008-12-18

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