EP0716176A2 - Ciel de toit perméable à vapeur - Google Patents

Ciel de toit perméable à vapeur Download PDF

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Publication number
EP0716176A2
EP0716176A2 EP19950118866 EP95118866A EP0716176A2 EP 0716176 A2 EP0716176 A2 EP 0716176A2 EP 19950118866 EP19950118866 EP 19950118866 EP 95118866 A EP95118866 A EP 95118866A EP 0716176 A2 EP0716176 A2 EP 0716176A2
Authority
EP
European Patent Office
Prior art keywords
composite
roofing underlayment
meltblown
roofing
underlayment according
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Withdrawn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
EP19950118866
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German (de)
English (en)
Inventor
Thomas Dirr
Andreas Strauss
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.)
Neenah Gessner GmbH
Original Assignee
Steinbeis Gessner GmbH
Gessner and Co 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 Steinbeis Gessner GmbH, Gessner and Co GmbH filed Critical Steinbeis Gessner GmbH
Publication of EP0716176A2 publication Critical patent/EP0716176A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics

Definitions

  • sloping roofs or pitched roofs under the cover material such as bricks, shingles, sheet metal etc. are used to protect the building from precipitation until the roof is covered with the cover material.
  • the roofing membrane protects against water. B. if the cover material is damaged, before flying snow, dust etc.
  • plastic in particular polyethylene foils, which may have been fabric-reinforced, or bitumen-coated materials such as z. B. the classic roofing felt. Both material qualities are very well waterproof, but not breathable. However, the water vapor permeability is necessary so that there is no moisture build-up under the roof and associated condensation. The roof must be able to "breathe”, ie the roofing membrane must be permeable to water vapor.
  • Newer roofing underlays made of calendered spunbonded fabrics or so-called flash spunbonded fabrics do not have the water vapor permeability that would be desirable if the water resistance is just sufficient (more than 100 cm water column tight). In addition, they are very thin and fluttering and can therefore only be installed by several people, especially in the wind.
  • the object of the invention is therefore to realize a roof waterproofing membrane combined with improved water vapor permeability, the good flatness of which at the same time permits problem-free laying.
  • the object of the invention is achieved in that very fine fiber nonwovens are used which are produced by the meltblown process.
  • the meltblown process is used in a form known per se, e.g. B. as published in Wente, Van A., "Superfine Thermoplastic Fibers", Industrial Engineering Chemestry, Vol. 48, pp. 1342-1346.
  • nonwovens with much finer fibers are formed by the meltblown process. This allows very fine pores to be created with a large open area (open volume).
  • a high open area or a high open volume means high air and vapor permeability.
  • the finer the pores the higher the penetration pressure for a liquid. This penetration pressure or the pressure required to wet the pores also depends on the surface tension of the wetting liquid. For the application under consideration, this is to be regarded as constant in relation to water. The penetration pressure is still dependent on the surface energy or Hydrophobicity of the polymer used in the meltblown process. This effect can also be modified by modifying the fiber surface. B. be further increased with flour chemicals. In this way, nonwovens can be produced which, compared to spunbonded fabrics or flash spunbonded nonwovens, have the same or even higher water resistance and, at the same time, a greatly increased vapor permeability.
  • hydrophobic polymers such as B. polypropylene, polyethylene, polyester, ethylene tetrafluoroethylene or poly-butylene terephthalate, poly-ethylene terephthalate or polycarbonate.
  • these materials can be used without subsequent compaction.
  • the meltblown nonwoven can be calendered, i.e. H. the pores are reduced in size and thus achieve a high level of water resistance with a relatively low basis weight, which also makes the product more cost-effective.
  • Calendering can take place at room temperature or under heat. Depending on the polymer, the temperature can be up to 180 ° C and will preferably be in the range of the so-called continuous use temperature of the respective polymer.
  • the line force in the calender gap is in the range of 50-500 daN / cm, preferably 150-300 daN / cm.
  • meltblown materials are used to increase the mechanical strength in combination with spunbonded fabrics.
  • This can be a two-layer or multi-layer composite.
  • a three-layer composite z.
  • B two identical or different spunbonded nonwovens, between which the meltblown nonwoven is embedded.
  • the three-layer composite has the advantage that the meltblown material is protected on both sides and so the active layer is optimally protected.
  • calendering is carried out in order to achieve a higher level of water resistance, this can either be done only on the meltblown alone and the composite subsequently produced, or the entire composite is calendered.
  • the spunbonded fabrics can be colored dark and / or equipped with UV stabilizers in order to maintain the mechanical stability and also to protect the meltblown underneath.
  • the meltblown can also be provided with UV stabilizers.
  • a wide variety of methods are conceivable as composite technologies for connecting meltblown and spunbonded fabrics: gluing, welding, ultrasonic welding, calendering, etc. It has proven particularly advantageous to achieve through-welding through the entire cross-section in a spot or other design. A three-layer composite then has a similar effect to riveting, since the two mechanically stable spunbonded fabrics get a good connection through the meltblown layer. The result is a high resistance to splitting.
  • a roof underlay has proven to be particularly favorable, in which the connection between a meltblown web and one or more spunbonded webs is produced by a combination of an ultrasonic welding and a calendering, in particular a cold calendering.
  • a composite technology offers the further advantage that the individual welding spots do not become brittle and have an improved elongation behavior compared to other joining techniques. This avoids that at least when small strains occur Leaks can occur.
  • the last-mentioned composite technology has the further advantage that it can achieve an even higher water resistance with a high vapor permeability.
  • the web 1 consists of a layer of polypropylene meltblown 2 in the middle with a cover on both sides made of polypropylene spunbonded nonwovens. B. 50 or 80 g / m2.
  • the spunbonded fabrics are dyed black and UV-stabilized. This shields the meltblown well against UV radiation until the roof is covered. In addition, UV stabilizer was added to the mass before the meltblown production.
  • the composite was ultrasonically welded in a point grid 5.
  • the two layers of the spunbond non-woven bond to one another, so that a high gap strength is achieved, similar to a riveted connection.
  • the watertightness of the composite measured as a water column up to the breakdown, is without further compression of the product (with a mass of 40 g / m2 for meltblown) 70 cm.
  • the water vapor permeability is far above the measuring limit, the air permeability at 230 l / m2s (measured at 20 mm water pressure difference).
  • the composite is calendered at room temperature under high line pressure (up to 150 - 300 daN / cm), the water column is increased to over 120 cm.
  • the water vapor permeability is still above the measuring limit, the air permeability (at 20 mm WS) in the range 5 - 50 l / m2s and can be adjusted depending on the required windproofness.
  • the vapor permeability is many times higher, the air permeability of these materials is below the measurement limit (less than 0.5 l / m2s).
  • the surface mass of 140 g / m2 results in a significantly better flatness and rigidity compared to Flashspunvlies, which make laying on the rafters 6 easier, especially in the wind. It is fastened by nailing on, the two spunbond layers guaranteeing a correspondingly high nail pull-out resistance, breaking load and tear resistance.
  • the counter battens 7 and battens 8 can be applied and the roof covered.
  • the interior of the roof, including the insulation layer 9, is protected against the ingress of rainwater, flying snow, dust, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
EP19950118866 1994-12-05 1995-11-30 Ciel de toit perméable à vapeur Withdrawn EP0716176A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944443157 DE4443157A1 (de) 1994-12-05 1994-12-05 Dampfdiffusionsoffene Dachunterspannbahn
DE4443157 1994-12-05

Publications (1)

Publication Number Publication Date
EP0716176A2 true EP0716176A2 (fr) 1996-06-12

Family

ID=6534899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950118866 Withdrawn EP0716176A2 (fr) 1994-12-05 1995-11-30 Ciel de toit perméable à vapeur

Country Status (2)

Country Link
EP (1) EP0716176A2 (fr)
DE (1) DE4443157A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742305B1 (fr) * 1995-05-03 2000-12-20 DON & LOW LIMITED Etoffes perméables
GB2513998A (en) * 2013-04-25 2014-11-12 Stephen John Makin Roofing system
US20200399904A1 (en) * 2019-06-24 2020-12-24 Owens Corning Intellectual Capital, Llc Roofing underlayment with hydrophobic nonwoven core
EP3611309B1 (fr) * 2018-08-15 2022-09-14 Ewald Dörken Ag Methode de pose d'une membrane de sous-toiture
US11629498B2 (en) 2018-05-11 2023-04-18 Owens Corning Intellectual Capital, Llc Reinforced breathable sheet

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29602475U1 (de) * 1996-02-13 1996-04-18 Spielau, Paul, Dipl.-Chem. Dr., 53844 Troisdorf Diffusionsoffene Dachunterspannbahn
DE19903663A1 (de) 1999-01-29 2000-08-24 Doerken Ewald Ag Verfahren zum Herstellen eines Vlieses insbesondere zur Verwendung für Unterspannbahnen für Bedachungen
DE19918439A1 (de) * 1999-04-23 2000-10-26 Sandler C H Gmbh Wasserdichter, wasserdampfdurchlässiger Kunststoffilm
DE10010867A1 (de) * 2000-03-06 2001-09-20 Roekona Textilwerk Gmbh Textiles Gleitmaterial
DE102014001792A1 (de) * 2014-02-12 2015-08-13 Sandler Ag Unterdeckplate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742305B1 (fr) * 1995-05-03 2000-12-20 DON & LOW LIMITED Etoffes perméables
GB2513998A (en) * 2013-04-25 2014-11-12 Stephen John Makin Roofing system
GB2513998B (en) * 2013-04-25 2020-11-11 Greenhill Industrial Holdings Ltd Roofing system
US11629498B2 (en) 2018-05-11 2023-04-18 Owens Corning Intellectual Capital, Llc Reinforced breathable sheet
EP3611309B1 (fr) * 2018-08-15 2022-09-14 Ewald Dörken Ag Methode de pose d'une membrane de sous-toiture
US20200399904A1 (en) * 2019-06-24 2020-12-24 Owens Corning Intellectual Capital, Llc Roofing underlayment with hydrophobic nonwoven core
US11518137B2 (en) * 2019-06-24 2022-12-06 Owens Corning Intellectual Capital, Llc Roofing underlayment with hydrophobic nonwoven core

Also Published As

Publication number Publication date
DE4443157A1 (de) 1996-06-13

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