EP1992761A1 - Joint d'étanchéité en plastique réalisé par procédé de thermomoulage - Google Patents

Joint d'étanchéité en plastique réalisé par procédé de thermomoulage Download PDF

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Publication number
EP1992761A1
EP1992761A1 EP07108159A EP07108159A EP1992761A1 EP 1992761 A1 EP1992761 A1 EP 1992761A1 EP 07108159 A EP07108159 A EP 07108159A EP 07108159 A EP07108159 A EP 07108159A EP 1992761 A1 EP1992761 A1 EP 1992761A1
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EP
European Patent Office
Prior art keywords
plastic seal
thermoplastic
plastic
tpe
segments
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Withdrawn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
EP07108159A
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German (de)
English (en)
Inventor
Reto Bucher
Willi Tenisch
Bernhard Achermann
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP07108159A priority Critical patent/EP1992761A1/fr
Publication of EP1992761A1 publication Critical patent/EP1992761A1/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/004—Battens
    • E04D12/006—Batten-supporting means

Definitions

  • the invention relates to a plastic seal for sealing penetrations in sealing elements, in particular in plastic films, preferably in sub-roof sheets, which are caused by fastening means such as nails, screws and the like, according to the preamble of the first claim. Furthermore, the invention is based on the use of such plastic seals as seals of penetrations in sealing elements, in particular in plastic films, preferably in sub-roof sheets.
  • Plastic seals for sealing penetrations in sealing elements are used in particular as nail or screw seals in the roof construction, in the attachment of the counter battens with the substructure. They are intended to prevent water, typically rainwater, from penetrating through the roof where nails or screws penetrate the sub-roof membrane.
  • the plastic seals commonly used today, also called nail seals consist in most cases of large-format foamed sheets of polyvinyl chloride (PVC), polyethylene (PE) or ethylene-propylene-diene rubber (EPDM) and are then punched out of these sheets.
  • PVC polyvinyl chloride
  • PE polyethylene
  • EPDM ethylene-propylene-diene rubber
  • the cell size in the final product depends on the Bulk density of the foam, wherein the cells have very different sizes and are arranged irregularly.
  • Such nail seals have the disadvantage that they deform irreversibly at high heat load and high pressure.
  • the invention has for its object to improve in a plastic seal for sealing penetrations in sealing elements of the type mentioned in the seal against water.
  • So core of the invention are plastic seals for sealing penetrations in sealing elements, especially in plastic films, preferably in sub-roof sheets, which are produced in a thermoplastic foam casting process from thermoplastics or thermoplastic elastomers.
  • substrates and structures of any shape and composition are understood, which serve the purpose of preventing or limiting an unwanted mass transfer between two rooms or areas.
  • thermoplastic elastomers in this document are understood as meaning plastics which combine the mechanical properties of vulcanized elastomers with the processability of thermoplastics.
  • thermoplastic elastomers are block copolymers with hard and soft segments or so-called polymer alloys having correspondingly thermoplastic and elastomeric constituents.
  • the advantages of the invention can be seen, inter alia, in the fact that the plastic seals, due to their manufacturing process and the choice of material, can be reversibly deformed even at high temperatures and high pressure. As a result, their shape adapts to their direct environment when changing the load, especially when the pressure on the plastic seal, and ensures optimum tightness. Also due to the manufacturing process, the plastic gaskets according to the invention have a compact outer skin, along which the water flows more easily. The water-repellent effect can also be favored by a suitable molding geometry The free three-dimensional design of the plastic seals also allows to provide them with, for example, a company logo or an indication of the application.
  • FIG. 1, FIG. 2, FIG. 3 and FIG. 4 are inventive plastic seals 1 for sealing penetrations in sealing elements, in particular in plastic films, preferably in sub-roof sheets, shown.
  • These plastic seals are made of a thermoplastic or of a thermoplastic elastomer and are produced in a so-called thermoplastic foam molding process.
  • the plastic seals produced by the thermoplastic foam molding process have a foamed core and a compact outer skin.
  • the foamed core gives the plastic seal the necessary elasticity, while the compact outer skin favors the drainage of the water along the plastic seal. This property can be further improved by the shape of the plastic seal. So shows, for example FIG.
  • a plastic gasket 1 having a pentagonal shape which, when properly placed on an inclined plane, such as a pitched roof, favors the drainage of the water and provides no possibility for water to accumulate or accumulate at the edge of the plastic gasket and to slowly seep in to penetrate the plastic film.
  • the same advantageous properties for example, also has a circular plastic seal, as in FIG. 2, FIG. 3 and FIG. 4 is shown on.
  • This embodiment is in the Figures 1 and 2 shown.
  • a plastic seal 1 can be produced, which has a sealing lip 2c on the underside.
  • the plastic seal 1 may additionally be equipped on at least one side with a self-adhesive strip, which serves to facilitate assembly.
  • a self-adhesive strip can according to FIG. 3 for example, be mounted in a recess 2b formed in the middle of the plastic seal.
  • a company logo 3a or a note on the application 3b to install the plastic seal.
  • these labels indicate how to optimally align the plastic gasket on an inclined plane, typically on a pitched roof.
  • a company logo 3a can also serve as an assembly aid in addition to the advertising effect.
  • thermoplastics and thermoplastic elastomers are in particular selected from the group consisting of polyethylene (PE), low density polyethylene (LDPE), ethylene / vinyl acetate copolymer (EVA), polybutene (PB); olefin-based thermoplastic elastomers (TPE-O, TPO) such as ethylene-propylene-diene / polypropylene copolymers; crosslinked olefin-based thermoplastic elastomers (TPE-V, TPV); thermoplastic polyurethanes (TPE-U, TPU) such as TPU with aromatic hard segments and polyester soft segments (TPU-ARES), soft polyether segments (TPU-ARET), polyester and polyether soft segments (TPU-AREE) or polycarbonate soft segments (TPU -ARCE); thermoplastic copolyesters (TPE-E, TPC) such as TPC with polyester soft segments (TPC-ES), soft polyether segments (TPC-ET) or
  • thermoplastic elastomers most preferably olefin-based thermoplastic elastomers (TPE-V, TPV) and styrene block copolymers (TPE-S, TPS), in particular butylene / styrene block copolymer (TPS-SEBS).
  • TPE-V olefin-based thermoplastic elastomers
  • TPS styrene block copolymers
  • TPS-SEBS butylene / styrene block copolymer
  • thermoplastic foam casting process a blowing agent-containing injection molding compound is injected into a tool which contains the negative mold of the plastic seal according to the invention.
  • the tool is only partially filled with injection molding compound, the remaining filling is carried out by the expansion of the propellant. It is distinguished between chemical and physical blowing agents.
  • chemical blowing agents of the injection molding compound chemical compounds are added, which split off under the action of heat gaseous decomposition products. These liberated gases then cause the foaming, so that cell-like structures are formed in the moldings.
  • the injection molding compound is injected with a gas which is inert to the polymers used, in particular nitrogen (N 2 ) or carbon dioxide (CO 2 ), in the liquid or supercritical state and mixed in.
  • a gas which is inert to the polymers used, in particular nitrogen (N 2 ) or carbon dioxide (CO 2 )
  • N 2 nitrogen
  • CO 2 carbon dioxide
  • the gas dissolves in the injection molding compound and expands only when pressure drops during the filling of the tool. This in turn results in cellular structures in the moldings. Moldings produced by this physical foaming feature a very fine, homogeneous cell structure, a compact outer skin and a low density.
  • Preferred blowing agents are N 2 and CO 2 , most preferably liquid or supercritical CO 2 .
  • thermoplastic foam molding process is generally known to the person skilled in the art from other fields of application and is described, for example, in US Pat Schwarz, O., Ebeling, F.-W., Furth, B., plastics processing, (Vogel book publishing, 10th edition, 2005) on pages 129-132 . Due to the thermoplastic foam casting process, plastic parts for sealing penetrations in sealing elements can be produced with optimal material use, which can be reversibly deformed due to the fine and uniform cell structure even at high temperatures and high pressure, as can occur, for example, on construction sites. In addition, the plastic gaskets produced in this way can be given a three-dimensional structure, by means of which water repellency or water removal is particularly favored.
  • FIGS. 5 and 6 is a preferred application of the inventive plastic seals shown.
  • an underlay 9 is mounted, whereupon a sub-roof sheet 8 comes to rest.
  • plastic seals 1 according to the invention are placed at the locations where the counter-battens are fastened to the sub-roof construction with fastening means 7, typically with nails or screws, which prevent the penetration of water through the sub-roof track.
  • fastening means 7 typically with nails or screws, which prevent the penetration of water through the sub-roof track.
  • cover 4 such as roof tiles, laid.
  • the invention comprises the use of previously described plastic seals 1 for sealing penetrations in sealing elements, in particular in plastic films, preferably in sub-roof sheets, as for example in FIG. 5 and FIG. 6 is shown.
  • the plastic seals between the counter battens 6 and the sub-roof track 8 are used at those locations where the counter battens with the sub-roof construction are fastened by fastening means 7 such as nails or screws.
  • plastic gaskets for example, the sealing of penetrations in objects which perform the function of a sealing element.
  • these are plates and sheets of different materials such as glass, ceramic, natural stone, metals, plastic, concrete, mortar, brick, brick or wood, which may also be coated, painted or otherwise pretreated.
  • plastic gaskets for roof construction these areas of application are in particular in other areas of civil engineering, in the industrial production of goods such as machinery, household appliances and means of transport or in the assembly of attachments.
EP07108159A 2007-05-14 2007-05-14 Joint d'étanchéité en plastique réalisé par procédé de thermomoulage Withdrawn EP1992761A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07108159A EP1992761A1 (fr) 2007-05-14 2007-05-14 Joint d'étanchéité en plastique réalisé par procédé de thermomoulage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07108159A EP1992761A1 (fr) 2007-05-14 2007-05-14 Joint d'étanchéité en plastique réalisé par procédé de thermomoulage

Publications (1)

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EP1992761A1 true EP1992761A1 (fr) 2008-11-19

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EP07108159A Withdrawn EP1992761A1 (fr) 2007-05-14 2007-05-14 Joint d'étanchéité en plastique réalisé par procédé de thermomoulage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013202626A1 (de) 2013-02-19 2014-08-21 Lisa Dräxlmaier GmbH Verfahren zur Herstellung eines Spritzgussteils
EP3712343A1 (fr) 2019-03-18 2020-09-23 Lenzing Plastics GmbH & Co KG Membrane d'étanchéité

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962016A (en) * 1973-09-14 1976-06-08 Dynamit Nobel Aktiengesellschaft Process for joining abutting thermoplastic synthetic-resin foam sheets
FR2520787A1 (fr) * 1982-02-04 1983-08-05 Nord Comptoir Tuilier Dispositif ameliorant la ventilation sous toiture et toitures munies de ce dispositif
FR2627428A1 (fr) * 1988-02-19 1989-08-25 Ta Trimph Adler Ag Procede de fabrication d'un cylindre d'impression en plastique pour machines a ecrire et analogues et cylindre ainsi obtenu
EP0877127A1 (fr) * 1997-05-09 1998-11-11 Reinhard Casutt Procédé de réalisation d'une liaison entre la couverture et la charpente d'une toiture à travers un isolant thermique, trépan et outillage relatif, et toiture isolée
US20010003625A1 (en) * 1998-11-20 2001-06-14 Jonathan W. Apgar Heat weldable epdm roffing membrane
WO2003033232A1 (fr) * 2001-10-15 2003-04-24 Peguform Gmbh & Co. Kg Dispositif et procede de production de pieces moulees en matiere plastique expansee au cours d'un processus de moulage par injection au moyen d'un fluide moussant physique comprime
US6607793B2 (en) * 1999-03-26 2003-08-19 Omnova Solutions Inc. Large width heat-weldable roof membrane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962016A (en) * 1973-09-14 1976-06-08 Dynamit Nobel Aktiengesellschaft Process for joining abutting thermoplastic synthetic-resin foam sheets
FR2520787A1 (fr) * 1982-02-04 1983-08-05 Nord Comptoir Tuilier Dispositif ameliorant la ventilation sous toiture et toitures munies de ce dispositif
FR2627428A1 (fr) * 1988-02-19 1989-08-25 Ta Trimph Adler Ag Procede de fabrication d'un cylindre d'impression en plastique pour machines a ecrire et analogues et cylindre ainsi obtenu
EP0877127A1 (fr) * 1997-05-09 1998-11-11 Reinhard Casutt Procédé de réalisation d'une liaison entre la couverture et la charpente d'une toiture à travers un isolant thermique, trépan et outillage relatif, et toiture isolée
US20010003625A1 (en) * 1998-11-20 2001-06-14 Jonathan W. Apgar Heat weldable epdm roffing membrane
US6607793B2 (en) * 1999-03-26 2003-08-19 Omnova Solutions Inc. Large width heat-weldable roof membrane
WO2003033232A1 (fr) * 2001-10-15 2003-04-24 Peguform Gmbh & Co. Kg Dispositif et procede de production de pieces moulees en matiere plastique expansee au cours d'un processus de moulage par injection au moyen d'un fluide moussant physique comprime

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013202626A1 (de) 2013-02-19 2014-08-21 Lisa Dräxlmaier GmbH Verfahren zur Herstellung eines Spritzgussteils
EP3712343A1 (fr) 2019-03-18 2020-09-23 Lenzing Plastics GmbH & Co KG Membrane d'étanchéité

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