EP0313735B1 - Method for the production of a multilayered bituminous sealing sheet - Google Patents

Method for the production of a multilayered bituminous sealing sheet Download PDF

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Publication number
EP0313735B1
EP0313735B1 EP88112009A EP88112009A EP0313735B1 EP 0313735 B1 EP0313735 B1 EP 0313735B1 EP 88112009 A EP88112009 A EP 88112009A EP 88112009 A EP88112009 A EP 88112009A EP 0313735 B1 EP0313735 B1 EP 0313735B1
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EP
European Patent Office
Prior art keywords
sheet
bituminous
coated
bitumen
adhesive layer
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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.)
Expired - Lifetime
Application number
EP88112009A
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German (de)
French (fr)
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EP0313735A2 (en
EP0313735A3 (en
Inventor
Hans-Günter Dipl.-Ing. Vogel
Joachim Dipl.-Ing. Oster
Hans Egon Dipl.-Ing. Carl
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Ruetgers Germany GmbH
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Ruetgerswerke AG
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Application filed by Ruetgerswerke AG filed Critical Ruetgerswerke AG
Priority to AT88112009T priority Critical patent/ATE74387T1/en
Publication of EP0313735A2 publication Critical patent/EP0313735A2/en
Publication of EP0313735A3 publication Critical patent/EP0313735A3/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch

Definitions

  • the invention relates to a method for producing a multilayer, bituminous sealing membrane, in particular of self-adhesive membranes.
  • Bituminous waterproofing membranes especially for waterproofing roofs, have been known for decades. They consist of an optionally impregnated insert, which is generally coated on both sides with a bituminous mass.
  • the surfaces of the webs can be sprinkled with mineral substances or laminated with foils as protection against the sun's rays and sticking when rolled up.
  • the sheets described are mostly glued over the entire surface with hot bitumen.
  • bitumen sheet coated on one or both sides with covering compositions is heated to a temperature between 140 and 220 ° C. after the complete cooling on its surface to be coated, but at least briefly above its softening point, immediately thereafter 140 to 220 ° C hot, bituminous or non-bituminous adhesive on the heat activated Surface is applied, and the finished web, optionally after applying a protective film, is cooled and wound up.
  • the adhesive layer is applied to the impregnated insert.
  • the impregnating compound emerging from the insert must be heat-activated or, if the surface is laminated with a film made of a thermoplastic, it must be heated at least to above its melting point. If the adhesive layer z. B. in the case of bitumen sheeting coated on both sides with a covering compound on this coating, the covering compound must be heat-activated. It does not matter whether the surface to be coated is powdered with talc or sprinkled with sand. In the case of a surface laminated with a closed plastic film, this must be heated as described above. Bitumen sheets are also known which are provided on the underside with a perforated plastic film, the uncovered surfaces of the covering compound being sprinkled with sand.
  • the surface must be heated at least to the softening point of the higher melting component. Because of the low thermal conductivity of the bitumen and the plastic film that may be used, it is possible to melt the surface of the bitumen sheet to a depth of only a few 1/100 mm without reducing the strength and dimensional stability of the sheet.
  • the bituminous covering compound can be modified with fillers, elastomers and / or thermoplastics. At its interface, it melts inseparably with the adhesive, whereby even adhering sand is completely covered. The adhesion in the interface exceeds the cohesion in the adhesive layer in the sealing membrane produced by the method according to the invention.
  • the adhesive can consist of a blown bitumen or of a hard distillation bitumen, which preferably contains no fillers. If necessary, it is laminated with a thin PE film.
  • the adhesive composition consists of a bitumen modified with elastomers and tackifying resins. It is laminated with a removable release film or release paper.
  • the invention is explained in more detail with reference to the drawing.
  • the Fig. Shows a device that connects to the cooling device of a conventional roofing membrane system.
  • the underside of bitumen sheet 1 is heated with infrared rays 4 to a surface temperature of 165 ° C.
  • a hot air blower or direct flames can be used instead of the heater.
  • the web is guided over the application roller 5, where an approximately 2 mm thick layer of the 165 ° C. hot adhesive 2 from the covering mass pan 6 onto the Underside of the web is applied.
  • the coated web is passed through the covering mill 7 in order to calibrate the strip thickness and to obtain a smooth surface.
  • the web is then deflected and passes through a turning chair 8, where in the curvature of the first roller the protective film 3 is brought into contact with the adhesive layer and rolled on by the unwinding bracket 9.
  • the protective film can be a thinner plastic film that connects non-detachably to the adhesive layer, or a peelable, e.g. B. siliconized release film.
  • the sealing membrane is then cooled in a conventional manner and fed to the winding apparatus via a hanging device. This part of the device is not shown in the figure, since it corresponds to the corresponding part of the usual roofing membrane system.

Abstract

To coat a sealing sheet with an adhesive layer, it is proposed that the cooled bituminous sheet be heated to above the melting point at the surface to be coated and the hot adhesive compound be applied immediately thereafter. This gives improved bonding between the layers without any danger of mixing taking place between the layers or of the quality of the sheet being lowered.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer mehrschichtigen, bituminösen Dichtungsbahn, insbesondere von selbstklebend ausgerüsteten Bahnen.The invention relates to a method for producing a multilayer, bituminous sealing membrane, in particular of self-adhesive membranes.

Bituminöse Dichtungsbahnen insbesondere für die Abdichtung von Dächern sind seit Jahrzehnten bekannt. Sie bestehen aus einer gegebenenfalls imprägnierten Einlage, die im allgemeinen beidseitig mit einer bituminösen Masse beschichtet ist. Die Oberflächen der Bahnen können mit mineralischen Stoffen abgestreut oder mit Folien kaschiert sein als Schutz gegen Sonneneinstrahlung und Verkleben im aufgerollten Zustand. Die beschriebenen Bahnen werden meist vollflächig mit Heißbitumen verklebt.Bituminous waterproofing membranes, especially for waterproofing roofs, have been known for decades. They consist of an optionally impregnated insert, which is generally coated on both sides with a bituminous mass. The surfaces of the webs can be sprinkled with mineral substances or laminated with foils as protection against the sun's rays and sticking when rolled up. The sheets described are mostly glued over the entire surface with hot bitumen.

Um die Verlegearbeit zu erleichtern wurde z. B. in dem DE-U-18 11 068 vorgeschlagen, die Dichtungsbahnen mit einer zusätzlichen Klebeschicht zu versehen. Je nach Beschaffenheit des verwendeten Klebers wird so eine Schweißbahn oder eine kaltselbstklebende Bahn erhalten. Um die Klebeschicht in gleichmäßiger Dicke auftragen zu können wird die Klebemasse üblicherweise auf die bereits erkaltete Dichtungsbahn aufgetragen. Die nach diesem Verfahren hergestellten Dichtungsbahnen genügten den üblichen Anforderungen. Durch Änderung der Baugewohnheiten wie größere Bauhöhen und leichtere Bauweisen für die Dächer haben sich die auf die Dachhaut wirkenden Kräfte deutlich erhöht. Es wurde dabei beobachtet, daß die Dichtungsbahnen nicht in jeden Fall ausreichend fest mit der Klebeschicht verbunden waren, vor allem wenn die Klebeschicht auf die mit einer Trennschicht aus Talkum, Sand oder Folie versehene Oberfläche der Bahn aufgetragen wurde. Aber auch beim Auftragen der Klebeschicht direkt auf die kalte Bitumenschicht, kann es zu Delaminationserscheinungen kommen.
Die geschilderte Problematik ist auch aus der DE-A-34 13 264 bekannt. Hier wird vorgeschlagen, die beschichtete fertige Dichtungsbahn unmittelbar nach dem Aufbringen der Klebeschicht von beiden Seiten her zu erwärmen und danach zu kühlen, um die Schichten ausreichend miteinander zu verbinden.
Wegen der geringen Wärmeleitfähigkeit des Bitumens, ist es notwendig die fertige Bahn weit über den Schmelzpunkt zu erhitzen, um eine vollkommene Zusammenschmelzung der bituminösen Schichten zu erreichen. Infolge der beachtlichen Viskositätsabsenkung vor allem in den oberflächennahen Schichten kommt es zu einer Verminderung der Qualität der Dichtungsbahnen.
Die Abstreuungen versinken zumindest teilweise in der Bitumenschicht und die Maßhaltigkeit der Bahnendicke ist nicht mehr gewährleistet. Falls die Bahn z. B. aus fertigungstechnischen Gründen an der Oberfläche mit einer Folie aus Polyolefinen kaschiert war, so wird diese durch die Hitzeeinwirkung zerstört. Das bekannte Verfahren ist daher höchstens für einen bestimmten Dichtungsbahnentyp mit hohem technischen Aufwand durchführbar.In order to facilitate the laying work z. B. proposed in DE-U-18 11 068 to provide the sealing sheets with an additional adhesive layer. Depending on the nature of the adhesive used, a welding sheet or a cold self-adhesive sheet is obtained. In order to be able to apply the adhesive layer in a uniform thickness, the adhesive is usually applied to the already cooled sealing membrane. The geomembranes produced using this method met the usual requirements. By changing the building habits such as larger heights and lighter designs for the roofs, the forces acting on the roof skin have increased significantly. It was observed that the sealing sheets were not always firmly connected to the adhesive layer, especially when the adhesive layer was applied to the surface of the sheet provided with a separating layer of talc, sand or foil. However, delamination can also occur when the adhesive layer is applied directly to the cold bitumen layer.
The problem described is also known from DE-A-34 13 264. It is proposed here to heat the coated finished sealing sheet from both sides immediately after applying the adhesive layer and then to cool it in order to adequately connect the layers to one another.
Due to the low thermal conductivity of the bitumen, it is necessary to heat the finished sheet well above the melting point in order to achieve a complete fusion of the bituminous layers. As a result of the considerable Lowering the viscosity, especially in the layers near the surface, leads to a reduction in the quality of the sealing membrane.
The scattering sinks at least partially in the bitumen layer and the dimensional accuracy of the sheet thickness is no longer guaranteed. If the train z. B. was laminated on the surface for manufacturing reasons with a film made of polyolefins, this is destroyed by the action of heat. The known method can therefore only be carried out for a certain type of geomembrane with a high technical outlay.

Es bestand daher die Aufgabe, ein einfaches Verfahren zur Herstellung einer mehrschichtigen, bituminösen Dichtungsbahn durch Beschichtung von üblichen Bitumenbahnen unterschiedlichen Typs mit einer Klebeschicht zu entwickeln, bei der die Klebeschicht mit der Bahn fest verbunden ist, ohne daß die Schichten sich soweit vermischen, daß eine Verminderung der Haftfähigkeit der Klebeschicht auftritt, oder es zu einer Qualitätsminderung der Bahn kommt.It was therefore the task of developing a simple method for producing a multilayer, bituminous sealing membrane by coating conventional bitumen membranes of different types with an adhesive layer, in which the adhesive layer is firmly connected to the membrane without the layers mixing to the extent that a There is a reduction in the adhesiveness of the adhesive layer, or the quality of the web is reduced.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine ein- oder beidseitig mit Deckmassen beschichtete Bitumenbahn nach dem vollständigen Abkühlen an ihrer zu beschichtenden Oberfläche auf eine Temperatur zwischen 140 und 220 °C, mindestens jedoch über deren Erweichungspunkt kurzzeitig erhitzt wird, unmittelbar anschließend die 140 bis 220 °C heiße, bituminöse oder nichtbituminöse Klebemasse auf die wärmeaktivierte Oberfläche aufgetragen wird, und die fertige Bahn, gegebenenfalls nach dem Aufbringen einer Schutzfolie, gekühlt und aufgewickelt wird.
Bei einseitig mit einer Deckmasse beschichteten Bitumenbahnen wird die Klebeschicht auf die imprägnierte Einlage aufgetragen. In diesem Fall muß die aus der Einlage austretende Imprägniermasse wärmeaktiviert werden oder, falls die Oberfläche mit einer Folie aus einem Thermoplasten kaschiert ist, muß diese mindestens bis über ihren Schmelzpunkt erhitzt werden.
Wird die Klebeschicht z. B . bei beidseitig mit einer Deckmasse beschichteten Bitumenbahnen auf diese Beschichtung aufgetragen, so muß die Deckmasse wärmeaktiviert werden. Dabei spielt es keine Rolle, ob die zu beschichtende Oberfläche mit Talkum bepudert oder mit Sand abgestreut ist. Bei einer mit einer geschlossenen Kunststoffolie kaschierten Oberfläche muß diese, wie vorstehend beschrieben, erhitzt werden. Es sind auch Bitumenbahnen bekannt, die unterseitig mit einer gelochten Kunststoffolie versehen sind, wobei die nicht abgedeckten Flächen der Deckmasse mit Sand abgestreut sind. In diesem Fall muß die Oberfläche zumindest bis auf den Erweichungspunkt der höher schmelzenden Komponente erwärmt werden. Wegen der geringen Wärmeleitfähigkeit des Bitumens und der gegebenenfalls verwendeten Kunststoffolie ist es möglich, die Oberfläche der Bitumenbahn bis zu einer Tiefe von nur wenigen 1/100 mm aufzuschmelzen, ohne die Festigkeit und Formbeständigkeit der Bahn zu mindern.The object is achieved in that a bitumen sheet coated on one or both sides with covering compositions is heated to a temperature between 140 and 220 ° C. after the complete cooling on its surface to be coated, but at least briefly above its softening point, immediately thereafter 140 to 220 ° C hot, bituminous or non-bituminous adhesive on the heat activated Surface is applied, and the finished web, optionally after applying a protective film, is cooled and wound up.
In the case of bitumen sheets coated with a covering compound on one side, the adhesive layer is applied to the impregnated insert. In this case, the impregnating compound emerging from the insert must be heat-activated or, if the surface is laminated with a film made of a thermoplastic, it must be heated at least to above its melting point.
If the adhesive layer z. B. in the case of bitumen sheeting coated on both sides with a covering compound on this coating, the covering compound must be heat-activated. It does not matter whether the surface to be coated is powdered with talc or sprinkled with sand. In the case of a surface laminated with a closed plastic film, this must be heated as described above. Bitumen sheets are also known which are provided on the underside with a perforated plastic film, the uncovered surfaces of the covering compound being sprinkled with sand. In this case, the surface must be heated at least to the softening point of the higher melting component. Because of the low thermal conductivity of the bitumen and the plastic film that may be used, it is possible to melt the surface of the bitumen sheet to a depth of only a few 1/100 mm without reducing the strength and dimensional stability of the sheet.

Die bituminöse Deckmasse kann mit Füllstoffen, Elastomeren oder/und Thermoplasten modifiziert sein. Sie verschmilzt an ihrer Grenzfläche unlösbar mit der Klebemasse , wobei auch anhaftender Sand vollständig umhüllt wird. Die Adhäsion in der Grenzfläche übersteigt bei der nach dem erfindungsgemäßen Verfahren hergestellten Dichtungsbahn die Kohäsion in der Klebeschicht.The bituminous covering compound can be modified with fillers, elastomers and / or thermoplastics. At its interface, it melts inseparably with the adhesive, whereby even adhering sand is completely covered. The adhesion in the interface exceeds the cohesion in the adhesive layer in the sealing membrane produced by the method according to the invention.

Die Klebemasse kann, wenn die Dichtungsbahn als Schweißbahn ausgebildet ist, aus einem geblasenen Bitumen oder aus einem harten Destillationsbitumen bestehen, das vorzugsweise keine Füllstoffe enthält. Sie wird gegebenenfalls mit einer dünnen PE-Folie kaschiert. Bei kaltselbstklebend ausgerüsteten Dichtungsbahnen besteht die Klebemasse aus einem Bitumen, das mit Elastomeren und klebrigmachenden Harzen modifiziert ist. Sie wird mit einer abziehbaren Trennfolie bzw. einem Trennpapier kaschiert.If the sealing membrane is designed as a welding membrane, the adhesive can consist of a blown bitumen or of a hard distillation bitumen, which preferably contains no fillers. If necessary, it is laminated with a thin PE film. In the case of waterproofing membranes with cold self-adhesive properties, the adhesive composition consists of a bitumen modified with elastomers and tackifying resins. It is laminated with a removable release film or release paper.

Die Erfindung wird anhand der Zeichnung näher erläutert.
Die Fig. zeigt eine Vorrichtung, die sich an die Kühlvorrichtung einer üblichen Dachbahnenanlage anschließt. Die Bitumenbahn 1 wird an ihrer Unterseite mit Infrarotstrahlen 4 bis auf eine Oberflächentemperatur von 165 °C aufgeheizt. Alternativ kann auch ein Heißluftgebläse oder direkte Flammen statt der Strahler verwendet werden. Unmittelbar anschließend wird die Bahn über die Antragswalze 5 geführt, wo eine etwa 2 mm dicke Schicht der 165 °C heißen Klebemasse 2 aus der Deckmassenpfanne 6 auf die Unterseite der Bahn aufgetragen wird. Die beschichtete Bahn wird durch das Deckmassenwalzwerk 7 geführt, um die Banndicke zu kalibrieren und eine glatte Oberfläche zu erhalten. Die Bahn wird dann umgelenkt und durchläuft einen Wendestuhl 8, wo in der Krümmung der ersten Walze die Schutzfolie 3 von dem Abwickelbock 9 mit der Klebeschicht in Berührung gebracht und aufgewalzt wird. Die Schutzfolie kann eine dünnere Kunststoffolie sein, die sich unlösbar mit der Klebeschicht verbindet, oder eine abziehbare, z. B. silikonisierte Trennfolie.
Anschließend wird die Dichtungsbahn in üblicher Weise gekühlt und über eine Hängevorrichtung der Wickelapparatur zugeführt. Dieser Teil der Vorrichtung ist in der Fig. nicht dargestellt, da er dem entsprechenden Teil der gebräuchlichen Dachbahnenanlage entspricht.The invention is explained in more detail with reference to the drawing.
The Fig. Shows a device that connects to the cooling device of a conventional roofing membrane system. The underside of bitumen sheet 1 is heated with infrared rays 4 to a surface temperature of 165 ° C. Alternatively, a hot air blower or direct flames can be used instead of the heater. Immediately afterwards, the web is guided over the application roller 5, where an approximately 2 mm thick layer of the 165 ° C. hot adhesive 2 from the covering mass pan 6 onto the Underside of the web is applied. The coated web is passed through the covering mill 7 in order to calibrate the strip thickness and to obtain a smooth surface. The web is then deflected and passes through a turning chair 8, where in the curvature of the first roller the protective film 3 is brought into contact with the adhesive layer and rolled on by the unwinding bracket 9. The protective film can be a thinner plastic film that connects non-detachably to the adhesive layer, or a peelable, e.g. B. siliconized release film.
The sealing membrane is then cooled in a conventional manner and fed to the winding apparatus via a hanging device. This part of the device is not shown in the figure, since it corresponds to the corresponding part of the usual roofing membrane system.

Claims (3)

  1. A method of producing a multiple-layer, bituminous sealing sheet, which is provided on the underside with an adhesive layer bonded where appropriate with a foil (3), from a bitumen sheet (1) with an inlay, characterized in that the bitumen sheet (1) coated on one or both sides with covering compounds is briefly heated after complete cooling on its surface to be coated to a temperature of between 140 and 220°C, but at least above the softening point thereof, immediately afterwards the 140 to 220°C hot bituminous or non-bituminous adhesive compound (2) is coated on the heat-activated surface, and the finished sheet, possibly after the application of a protective foil (3), is cooled and wound up.
  2. A method according to Claim 1, characterized in that the surface of the bitumen sheet (1) is heated with infrared radiation (4).
  3. A method according to Claim 1 or 2, characterized in that the protective foil (3) is brought into contact with the adhesive layer in the curve of the first roller of a turning stand (8).
EP88112009A 1987-10-29 1988-07-26 Method for the production of a multilayered bituminous sealing sheet Expired - Lifetime EP0313735B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112009T ATE74387T1 (en) 1987-10-29 1988-07-26 PROCESS FOR MANUFACTURING A MULTI-LAYER BITUMINOUS SEALING MEMBRANE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3736672 1987-10-29
DE19873736672 DE3736672A1 (en) 1987-10-29 1987-10-29 METHOD FOR PRODUCING A MULTILAYERED, BITUMINOUS SEALING SHEET

Publications (3)

Publication Number Publication Date
EP0313735A2 EP0313735A2 (en) 1989-05-03
EP0313735A3 EP0313735A3 (en) 1990-04-25
EP0313735B1 true EP0313735B1 (en) 1992-04-01

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EP88112009A Expired - Lifetime EP0313735B1 (en) 1987-10-29 1988-07-26 Method for the production of a multilayered bituminous sealing sheet

Country Status (8)

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EP (1) EP0313735B1 (en)
JP (1) JPH01139880A (en)
CN (1) CN1012087B (en)
AT (1) ATE74387T1 (en)
CS (1) CS274684B2 (en)
DE (2) DE3736672A1 (en)
ES (1) ES2007590A4 (en)
GR (2) GR890300064T1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19957279B4 (en) * 1999-11-29 2011-07-28 BOSIG GmbH, 73333 Method for covering a concrete floor or building wall with a profiled sheet
EP1104818A1 (en) 1999-11-30 2001-06-06 Performance Roof Systems S.A. en abrégé P.R.S. Waterproofing membrane and method for its manufacture
DE20014903U1 (en) * 2000-02-07 2001-02-15 Cww Gerko Akustik Gmbh & Co Kg Waterproofing membrane for buildings
JP2012143396A (en) * 2011-01-12 2012-08-02 Fujifilm Corp Radiographic grating unit and radiographic system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1504097C2 (en) * 1964-04-18 1971-12-16 Continental Gummi Werke Ag PROCESS FOR MANUFACTURING SHEETS OR PANELS FROM PREFERABLY TRANSPARENT THERMOPLASTIC PLASTICS WITH EMBEDDED REINFORCING INSERTS
DE3413264C2 (en) * 1984-04-07 1994-04-21 Icopal Siplast Gmbh Process for producing a bitumen sheet with several bitumen layers
DE8801768U1 (en) * 1988-02-11 1988-03-31 Ruetgerswerke Ag, 6000 Frankfurt, De

Also Published As

Publication number Publication date
CS274684B2 (en) 1991-09-15
ES2007590A4 (en) 1989-07-01
CN1033300A (en) 1989-06-07
DE3869729D1 (en) 1992-05-07
CS676288A2 (en) 1991-01-15
GR3004768T3 (en) 1993-04-28
EP0313735A2 (en) 1989-05-03
CN1012087B (en) 1991-03-20
GR890300064T1 (en) 1989-06-22
DE3736672A1 (en) 1989-05-11
ATE74387T1 (en) 1992-04-15
JPH01139880A (en) 1989-06-01
EP0313735A3 (en) 1990-04-25

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