DE3518747A1 - Plastic sealing sheet - Google Patents

Plastic sealing sheet

Info

Publication number
DE3518747A1
DE3518747A1 DE19853518747 DE3518747A DE3518747A1 DE 3518747 A1 DE3518747 A1 DE 3518747A1 DE 19853518747 DE19853518747 DE 19853518747 DE 3518747 A DE3518747 A DE 3518747A DE 3518747 A1 DE3518747 A1 DE 3518747A1
Authority
DE
Germany
Prior art keywords
plastic
sheets
sealing sheet
plastic sealing
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19853518747
Other languages
German (de)
Inventor
Dieter Dipl.-Ing. Jablonka
Klaus Dipl.-Ing. 5804 Herdecke Urban
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Doerken Ewald Co KG GmbH
Original Assignee
Doerken Ewald Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Doerken Ewald Co KG GmbH filed Critical Doerken Ewald Co KG GmbH
Priority to DE19853518747 priority Critical patent/DE3518747A1/en
Priority to EP86103816A priority patent/EP0199099A3/en
Publication of DE3518747A1 publication Critical patent/DE3518747A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/004—Sealing liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/14—PVF, i.e. polyvinyl fluoride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
    • B29K2029/04—PVOH, i.e. polyvinyl alcohol
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

To improve a plastic sealing sheet for systems for storing substances hazardous to water, in particular for landfill sites, such that said plastic sealing sheet cannot only be joined together to form a large-surface, homogeneous landfill seal, but that a higher impermeability can also be achieved than with the plastic sealing sheets hitherto used for this purpose, it is proposed to use a multi-layer sheet which consists of two homogeneous sheets (1, 2) which are identical to one another, are arranged on the top side and bottom side respectively of the multi-layer sheet and are made of plastic which is readily weldable, has a high weather resistance and ageing resistance and a high UV radiation resistance, a high tensile strength and extensibility and a high chemical resistance, and of at least one sheet (3, 7, 8) which is arranged congruently between the aforesaid sheets (1 and 2) and is made of plastic which has a higher vapour tightness to aromatics and also to hydrocarbons than the outer sheets (1, 2) and has at least approximately the same mechanical properties as the plastic of the two outer sheets (1 and 2). <IMAGE>

Description

"Kunststoffdichtungsbahn" "Plastic geomembrane"

Die Erfindung betrifft eine ca. 2 mm dicke Kunststoffdichtungsbahn für Anlagen zur Lagerung von wassergefährdenden Stoffen, insbesondere für Mülldeponien.The invention relates to an approximately 2 mm thick plastic sealing membrane for systems for the storage of substances hazardous to water, especially for landfills.

Um den Zutritt von Sickerwasser aus Deponien in den Untergrund zu verhindern oder auf ein Mindestmaß zu beschränken, ist es bekannt, die muldenförmigen Deponien mit Dichtungen aus einer Vielzahl nebeneinander angeordneter und miteinander großflächig verschweißten Kunststoffdichtungsbahnen, zum Beispiel aus Polyvinylchlorid, Polyethylen, chloriertem Polyethylen, Ethylen-Propylen-Terpolymer oder aus Ethylen-Cop.-Bitumen auszukleiden.In order to prevent seepage water from landfills into the subsoil prevent or minimize, it is known to trough-shaped Landfills with seals made of a multitude of juxtaposed and interrelated Large-area welded plastic sealing sheets, for example made of polyvinyl chloride, Polyethylene, chlorinated polyethylene, ethylene-propylene terpolymer or from ethylene-copolymer bitumen to undress.

Derartige Kunststoffdichtungsbahnen sind unter anderem zwar miteinander gut verschweißbar, auch ist deren mechanische Festigkeit nach menschlichem Ermessen ausreichend, um auch den Zugbeanspruchungen widerstehen zu können, die zum Beispiel bei Setzungsvorgängen der Deponiesohle auftreten können, aber dennoch besteht hierbei die Gefahr der Verunreinigung des Grundwassers durch Permeation von Kohlenwasserstoffen, chlorierten Kchlenwasserstoffen oder deren Dämpfen.Such plastic sealing sheets are inter alia with each other easy to weld, their mechanical strength is also based on human judgment sufficient to to be able to withstand tensile loads, which can occur, for example, when the bottom of the landfill settles, but still there is a risk of contamination of the groundwater through permeation of hydrocarbons, chlorinated hydrocarbons or their vapors.

Es gibt zwar Kunststoffe, die eine größere Dichtigkeit als die vorgenannten Kunststoffe haben, um auch Deponien gegen die zuvor ge nannten Stoffe oder deren Dämpfe abdichten zu können, aber diese sind unter anderem nicht so gut und dicht verschweißbar, daß daraus großflächige, homogene Deponie-Dichtungen gebildet werden können.Although there are plastics that have a greater tightness than the aforementioned Plastics have to be dumped against the aforementioned substances or their To be able to seal off vapors, but these are among other things not as good and tight weldable so that large-area, homogeneous landfill seals are formed from it can.

Aufgabe der Erfindung ist es nun, eine Kunststoffdichtungsbahn der im Oberbegriff des Anspruches 1 angegebenen Art derart zu verbessern, daß diese unter anderem nicht nur zu großflächigen homogenen Deponiedichtungen sicher zusammengefügt werden können, sondern daß auch eine größere Dichtigkeit als mit bisher verwendeten Kunststoffdichtungsbahnen erreichbar ist.The object of the invention is now to provide a plastic sealing membrane in the preamble of claim 1 specified type to improve such that this including not only large-area, homogeneous landfill seals for sure can be joined together, but that also has a greater tightness than with previously used plastic geomembranes is achievable.

Die Lösung dieser Aufgabe kennzeichnet sich durch eine mittlere Kunststoffschicht mit einer hohen Dampfdichtigkeit gegen Aromaten und auch gegen chlorierte Kohlen-Wasserstoffe.The solution to this problem is characterized by a middle layer of plastic with a high vapor tightness against aromatics and also against chlorinated hydrocarbons.

Durch diese Maßnahmen stehen sich beim Verschweißen von nebeneinander angeordneten Kunststoffdichtungsbahnen, wobei sich deren Randteile jeweils überlappen, stets gut verschweißbare Kunststoffbahnen gegenüber, so daß einerseits eine sichere und auch dichte Verbindung nebeneinander angeordneter Kunststoffdichtungsbahnen erreichbar ist.These measures stand side by side when welding arranged plastic sealing sheets, the edge parts of which overlap each other, always well weldable plastic sheets opposite, so that on the one hand a safe and also tight connection of plastic sealing sheets arranged next to one another is attainable.

Andererseits werden durch die zwischen den äußeren Kunststoffbahnen angeordneten Kunststoffbahnen mit gegenüber den äußeren Kunststoffbahnen h-öherer Dampfdichtigkeit auch solche Stoffe und Gase zurückgehalten, die die äußeren Kunststoffbahnen evtl. durchdrungen haben sollten.On the other hand, through the between the outer plastic sheets arranged plastic sheets with opposite the outer plastic sheets Higher vapor tightness also retained those substances and gases which the external Plastic sheeting should have penetrated.

Dabei ist auch eine hohe mechanische Belastbarkeit der mehrschichtigen Kunststoffdichtungsbahn sichergestellt, die durch Einlagerung zum Beispiel einer Aluminiumfolie nicht erreichbar ist, weil Aluminiumfolien keine ausreichende Dehnung haben.There is also a high mechanical load-bearing capacity of the multilayered Plastic geomembrane ensured that by storing, for example, a Aluminum foil is not achievable because aluminum foils do not stretch sufficiently to have.

Bevorzugterweise sind die Kunststoffschichten als Bahnen ausgebildet und miteinander stoffschlüssig, insbesondere durch Extrusion verbunden.The plastic layers are preferably designed as webs and connected to one another in a materially bonded manner, in particular by extrusion.

Weitere Möglichkeiten zur homogenen Verbindung der Kunststoffbahnen sind in den Ansprüchen 3 bis 5 offenbart.Further possibilities for a homogeneous connection of the plastic sheets are disclosed in claims 3-5.

Eine fertigungstechnisch, besonders günstige, als auch günstig zu verarbeitende und gegen aggressive Medien resistente Ausführungsform ist dadurch gekennzeichnet, daß die äußeren Kunststoffbahnen aus Polyethylen, die mittlere Kunststoffbahn aus Polyester besteht.A manufacturing technology, particularly cheap, as well as cheap too processing and resistant to aggressive media embodiment is thereby characterized in that the outer plastic webs made of polyethylene, the middle plastic web is made of polyester.

Zur weiteren Verbesserung u.a. der Dichtigkeit ist es vorteilhaft, wenn die äußeren Bahnen jeweils aus mehreren, dünnen Folien zusammengefügt sind.To further improve the tightness, among other things, it is advantageous to when the outer webs are each put together from several thin foils.

Unter Umstänen bevorzugte Varianten sind in den Ansprüchen 8 bis 10 offenbart.Variants which may be preferred are in claims 8 to 10 disclosed.

Unter Umständen ist es besonders vorteilhaft, wenn die Zwischenbahn aus Polyvinylalkohol (PVA) besteht.Under certain circumstances it is particularly advantageous if the intermediate track made of polyvinyl alcohol (PVA).

Zudem sollte die obere, äußere Bahn weiß und die untere, äußere Bahn schwarz sein, weil einerseits eine weiße Oberseite die Erkennbarkeit von leckstellen verbessert und eine Aufheizung der Kunststoffdichtungsbahn durch Sonneneinstrahlung vermindert.In addition, the upper, outer panel should be white and the lower, outer panel be black, because on the one hand a white upper side makes the leak recognizable improved and a heating of the plastic sealing membrane Reduced exposure to sunlight.

Andererseits wird durch schwarze Färbung in an sich bekannter Weise die Alterungsbeständigkeit erhöht.On the other hand, by black coloring in a manner known per se the aging resistance increases.

Eine vorteilhafte Weiterbildung des vorbeschriebenen Gegenstandes besteht noch darin, daß die der Verbesserung der Dampfdichtigkeit dienenden Kunststoffbahnen in die äußeren Kunststoffbahnen eingesiegelt sind, insbesondere derart, daß die Randteile der äußeren Kunststoffbahnen über den Rand der mittleren Kunststoffbahnen hinausreichen und miteinander verschweißt sind.An advantageous development of the subject matter described above still consists in the fact that the plastic sheets serving to improve the vapor tightness are sealed in the outer plastic sheets, in particular such that the Edge parts of the outer plastic sheets over the edge of the middle plastic sheets reach out and are welded together.

Hierdurch ist die eingelagerte Kunststoffbahn, die möglicherweise nicht so resistent gegen aggressive Medien wie die äußeren Kunststoffbahnen ist, nunmehr auch im Bereich der Ränder von den äußeren Kunststoffbahnen sicher abgedeckt.As a result, the embedded plastic sheet that may is not as resistant to aggressive media as the outer plastic sheets, now also safely covered by the outer plastic sheets in the area of the edges.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are shown in the drawing and are described in more detail below.

Es zeigen: Fig. 1 bis 5 Teile zweier miteinander verschweißter, mehrschichtiger Kunststoffdichtungsbahnen jeweils im Schnitt.They show: FIGS. 1 to 5 parts of two multi-layered parts welded to one another Plastic geomembranes in each case in section.

Allen Ausführungsformen ist gemeinsam, daß jeweils zwischen zwei Kunststoffbahnen 1 und 2 aus Polyethylen mindestens eine Kunststoffbahn 3 aus Kunststoff mit einer gegenüber Polyehtylen höheren Damfdichtigkeit angeordnet ist. Alle Kunststoffbahnen 1 und 3 sind über ihre gesamte Fläche miteinander unlösbar verbunden. Zudem sind in allen Fällen die einander benachbarten, mehrschichtigen Kunststoffdichtungsbahnen 4 und 5 so angeordnet, daß sich deren Randteile einander überlappen.It is common to all embodiments that in each case between two plastic sheets 1 and 2 made of polyethylene at least one plastic sheet 3 made of plastic with a compared to polyethylene is arranged higher vapor tightness. All plastic sheets 1 and 3 are inextricably linked to one another over their entire surface. In addition, are in all cases the mutually adjacent, multi-layer plastic sealing sheets 4 and 5 arranged so that their edge parts overlap each other.

In den Bereichen der Überlappungen ist mindestens eine über die gesamte Länge der miteinander verbundenen Kunststoffdichtung'sbahnen 4 und 5 sich erstreckende Schweißnaht 6 angeordnet.In the areas of the overlap is at least one over the entire length of the interconnected plastic sealing webs 4 and 5 extending weld 6 arranged.

Wie aus der Fig. 2 ersichtlich, können- in an sich bekannter Weise auch zwei mit Abstand nebeneinander angeordnete Schweißnähte 6 vorgesehen werden, um zwischen den beiden Schweißnähten einen mit Druckluft beaufschlagbaren Kanal zur Prüfung der Schweißnähte auf Dichtigkeit zu bilden.As can be seen from FIG. 2, in a manner known per se two weld seams 6 arranged at a distance from one another are also provided, around a duct that can be pressurized with compressed air between the two weld seams to test the weld seams for leaks.

In Fig. 1 besteht die mittlere Kunststoffbahn 3 aus- Polyester.In Fig. 1, the middle plastic sheet 3 consists of polyester.

Gemäß Fig. 2 ist zwischen den beiden äußeren Kunststoffbahnen 1 und 2 aus Polyethylen eine Kunststoffbahn 3 aus Polyamid angeordnet, welche außer einer höheren Dampfdichtigkeit als Polyehtylen gegen Kohlen-Wasserstoffe auch. eine höhere chemische Beständigkeit aufweist.According to Fig. 2 is between the two outer plastic sheets 1 and 2 made of polyethylene, a plastic sheet 3 made of polyamide, which apart from one also higher vapor tightness than polyethylene against hydrocarbons. a higher one Chemical resistance having.

Figur 3 zeigt eine mehrschichtige Kunststoffdichtungsbahn, bei welcher zwischen zwei äußeren Kunststoffbahnen 1 und 2 aus Polyethylen eine Kunststoffbahn 3 aus Polyvinylfluorid eingelagert ist. Gemäß Figur 4 sind zwischen zwei äußeren Kunststoffbahnen 1 und 2 aus Polyethylen drei Kunststoffbahnen 7 und 8 angeordnet, und zwar zwei Kunststoffbahnen 7 jeweils aus Polyethylenterephthalat und eine Kunststoffbahn 8 aus Polyamid, wobei letzere zwischen den Kunststoffbahnen 7 angeordnet ist, die jeweils einer Kunststoffbahn 1 bezw. 2 aus Polyethylen benachbart sind.Figure 3 shows a multilayer plastic sealing membrane in which a plastic sheet between two outer plastic sheets 1 and 2 made of polyethylene 3 made of polyvinyl fluoride is incorporated. According to Figure 4 are between two outer Plastic sheets 1 and 2 made of polyethylene, three plastic sheets 7 and 8 arranged, namely two plastic webs 7 each made of polyethylene terephthalate and one plastic web 8 made of polyamide, the latter being arranged between the plastic sheets 7, the each a plastic sheet 1 respectively. 2 made of polyethylene are adjacent.

Gemäß Figur 5 reichen jeweils die Randteile der beiden äußeren Kunststoffbahnen 1 und 2 aus Polyethylen über den Rand der dazwischen angeordneten Kunststoffbahn 3, zum Beispiel aus Polyester, hinaus und sind miteinander homogen verbunden, so daß die mittlere Kunststoffbahn 3 völlig eingesiegelt ist.According to FIG. 5, the edge parts of the two outer plastic webs are sufficient in each case 1 and 2 made of polyethylene over the edge of the plastic sheet arranged in between 3, for example made of polyester, and are homogeneously connected to each other, see above that the middle plastic sheet 3 is completely sealed.

Alle neuen, in der Beschreibung und/oder Zeichnung offenbarten Einzel- und Kombinationsmerkmale werden als erfindungswesentlich angesehen.All new items disclosed in the description and / or drawing and combination features are considered essential to the invention.

Claims (13)

Patentansprüche: 1. Kunststoffdichtungsbahn für Anlagen zur Lagerung von wassergefährdenden Stoffen, insbesondere für Mülldeponien, bestehend aus zwei zueinander gleichen, oberseitig bzw. Claims: 1. Plastic geomembrane for storage systems of substances hazardous to water, especially for landfills, consisting of two equal to each other, on the top or unterseitig der Mehrschichtbahn angeordneten, homogenen Schichten aus Kunststoff, der gut verschweißbar ist, eine hohe Witterungs-und Alterungsbeständigkeit sowie eine hohe UV-Strahlen-Beständigkeit, eine hohe Dehnbarkeit, eine hohe Zugfestigkeit und eine hohe chemische Beständigkeit hat und aus mindestens einer zwischen den vorgenannten Bahnen deckungsgleich angeordneten sowie mit letzteren unlösbar verbundenen Schicht aus Kunststoff mit einer gegenüber den äußeren Schichten höheren Dampdichtigkeit und mit mindestens annäherd gleichen mechanischen Eigenschaften wie die der äußeren Kunststoffbahnen, gekennzeichnet durch eine mittlere Kunststoffschicht (3,7,8) mit einer hohen Dampfdichtigkeit gegen Aromaten und auch gegen chlorierte Kohlen-Wasserstoffe. homogeneous layers arranged on the underside of the multilayer web made of plastic, which is easy to weld, a high resistance to weathering and aging as well as high UV radiation resistance, high ductility, high tensile strength and has high chemical resistance and has at least one between the aforementioned tracks arranged congruently and inextricably linked to the latter Layer made of plastic with a higher vapor tightness than the outer layers and with at least approximately the same mechanical properties like that of the outer plastic sheets, characterized by a middle plastic layer (3,7,8) with a high vapor tightness against aromatics and also against chlorinated ones Hydrocarbons. 2. Kun-ststoffdichtungsbahn nach Anspruch 1, dadurch gekennzeichnet, daß die Kunststoffschichten als Bahnen (1,2,3,7,8) ausgebildet und miteinander stoffschlüssig, insbesondere durch Extrusion verbunden sind.2. Plastic sealing membrane according to claim 1, characterized in that that the plastic layers are designed as webs (1,2,3,7,8) and are firmly bonded to one another, in particular connected by extrusion. 3. Kunststoffdichtungsbahn nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Haftung der einzelnen Lagen durch chemische Behandlung, insbesondere durch Ätzen oder durch Oxydieren verbessert wird.3. Plastic sealing sheet according to claim 1 or 2, characterized in that that the adhesion of the individual layers by chemical treatment, in particular by Etching or by oxidizing is improved. 4. Kunststoffdichtungsbahn nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kunststoffbahnen (1,2,3,7,8) miteinander mittels Haftvermittlern, insbesondere mittels Acrylharzen oder mittels Polyurethane verbunden sind.4. Plastic sealing sheet according to claim 1 or 2, characterized in that that the plastic webs (1,2,3,7,8) together by means of adhesion promoters, in particular are connected by means of acrylic resins or by means of polyurethanes. 5. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß eine bessere Haftung der einzelnen Lagen durch eine Corona-Vorbehandlung erreicht wird.5. Plastic sealing membrane according to one of the preceding claims, characterized characterized in that a better adhesion of the individual layers through a corona pretreatment is achieved. 6. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die äußeren Kunststoffbahnen (1,2) aus Polyethylen, die mittlere Kunststoffbahn (3) aus Polyester besteht.6. Plastic sealing sheet according to one of the preceding claims, characterized characterized in that the outer plastic sheets (1,2) made of polyethylene, the middle Plastic sheet (3) consists of polyester. 7. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die äußeren Bahnen jeweils aus mehreren, dünnen Folien zusammengefügt sind.7. Plastic sealing sheet according to one of the preceding claims, characterized characterized in that the outer webs are each assembled from several thin films are. 8. Kunststoffdichtungsbahn nach einem der vorherigen Ansrüche, dadurch gekennzeichnet, daß- zwischen zwei äußeren Kunststoffbahnen (1,2) aus Polyethylen eine Kunststoffbahn (3) aus Polyamid angeordnet ist.8. Plastic geomembrane according to one of the previous claims, thereby characterized that- between two outer plastic sheets (1,2) made of polyethylene a plastic sheet (3) made of polyamide is arranged. 9. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die mittlere Kunststoffbahn (3) aus fluorhaltigen- Kunsts#toffen, insbesondere aus Polyvinylfluorid bzw. Polytetrafluorethylen besteht, die beidseitig mit je einer Kunststoffbahn (1,2) aus Polyethylen beschichtet ist.9. Plastic sealing sheet according to one of the preceding claims, characterized characterized in that the middle plastic sheet (3) made of fluorine-containing plastics, in particular consists of polyvinyl fluoride or polytetrafluoroethylene, which on both sides each coated with a plastic sheet (1,2) made of polyethylene. 10. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß zwischen den äußeren Kunststoffbahnen (1,2) aus Polyethylen Kunststoffbahnen (7,8) aus Polyethylenterephthalat und aus Polyamid angeordnet sind. 10. Plastic sealing membrane according to one of the preceding claims, characterized in that between the outer plastic webs (1,2) made of polyethylene Plastic webs (7,8) made of polyethylene terephthalate and polyamide are arranged. 11. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Zwischenbahn aus Polyvinylalkohol besteht.11. Plastic sealing sheet according to one of the preceding claims, characterized characterized in that the intermediate web consists of polyvinyl alcohol. 12. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die obere, äußere Bahn weiß, die untere, äußere Bahn schwarz ist.12. Plastic sealing sheet according to one of the preceding claims, characterized characterized in that the upper, outer track is white, the lower, outer track is black is. 13. Kunststoffdichtungsbahn nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die der Verbesserung der Dampfdichtigkeit dienenden Kunststoffbahnen (3,7,8) in die äußeren Kunststoffbahnen (1,2) eingesiegelt sind, insbesondere derart, daß die Randteile der äußeren Kunststoffbahnen (1,2) über den Rand der mittleren Kunststoffbahnen (3,7,#8) hinausreichen und miteinander verschweißt sind.13. Plastic sealing sheet according to one of the preceding claims, characterized marked, that serve to improve the vapor tightness Plastic sheets (3,7,8) are sealed in the outer plastic sheets (1,2), in particular such that the edge parts of the outer plastic webs (1,2) over the Reach out to the edge of the middle plastic sheets (3, 7, # 8) and weld them together are.
DE19853518747 1985-04-20 1985-05-24 Plastic sealing sheet Withdrawn DE3518747A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19853518747 DE3518747A1 (en) 1985-05-24 1985-05-24 Plastic sealing sheet
EP86103816A EP0199099A3 (en) 1985-04-20 1986-03-20 Plastic sealing sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853518747 DE3518747A1 (en) 1985-05-24 1985-05-24 Plastic sealing sheet

Publications (1)

Publication Number Publication Date
DE3518747A1 true DE3518747A1 (en) 1986-11-27

Family

ID=6271576

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853518747 Withdrawn DE3518747A1 (en) 1985-04-20 1985-05-24 Plastic sealing sheet

Country Status (1)

Country Link
DE (1) DE3518747A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514383A1 (en) * 1985-04-20 1986-10-23 Ewald Dörken GmbH & Co KG, 5804 Herdecke Plastic waterproofing sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514383A1 (en) * 1985-04-20 1986-10-23 Ewald Dörken GmbH & Co KG, 5804 Herdecke Plastic waterproofing sheet

Similar Documents

Publication Publication Date Title
DE4125430C2 (en) Arrangement of tightness controllable sealing sheets made of plastic, especially for landfills
DE1751406A1 (en) Container for storing liquefied gas
EP0269871B1 (en) Flooring material
EP0295436A2 (en) Inner floating cover
DE3514383A1 (en) Plastic waterproofing sheet
DE10230552A1 (en) Stretchable web material
EP0310902A1 (en) Prefabrication element for a gutter, and gutter assembled with such an element
DE3518747A1 (en) Plastic sealing sheet
EP0199099A2 (en) Plastic sealing sheet
DE1937998B2 (en) Compressed air laminates
DE2555445C3 (en) Weldable and flexible membrane, consisting of a sealing membrane made of an ethylene copolymer and bitumen and a polyethylene or polyamide film connected to the sealing membrane
DE3719443A1 (en) Floor covering
DE102004015694B4 (en) composite mat
DE3535705A1 (en) Multilayer and/or multiply sealing sheet
DE3308941C2 (en) Plate-shaped thermal insulation element
DE2920989A1 (en) BUILDING MATERIAL IN PARTICULAR FOR CRYOGENIC CONTAINERS AND CONTAINERS PROVIDED WITH SUCH MATERIAL
EP0224638A2 (en) Sealing for contaminated sites, in particular waste deposits
EP1339624B1 (en) Fluid container and means and method for lining the same
DE2560210C2 (en) Sealing skin on a supporting structure, e.g. a drinking water tank made of weldable and flexible sheets
WO1993009041A1 (en) Storage container for liquid and/or solid chemical precipitants
DE3317852A1 (en) Lining for liquid-containing containers and process for the production thereof
AT379422B (en) METHOD FOR MONITORING DOUBLE-WALLED SEALS ON CONSTRUCTIONS AND MATERIAL FOR PRODUCING THE SEALS
DE19534977A1 (en) Low-permeation composite material for retaining gas or vapour
DE3428094A1 (en) Slab-shaped building element
AT398284B (en) METHOD FOR PRODUCING A SEALING MAT, AND SEALING MAT PRODUCED BY THIS PROCESS

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8130 Withdrawal