WO1999055983A1 - Wasserdichtes wasserdampfdurchlässiges flachmaterial - Google Patents
Wasserdichtes wasserdampfdurchlässiges flachmaterial Download PDFInfo
- Publication number
- WO1999055983A1 WO1999055983A1 PCT/DE1999/001236 DE9901236W WO9955983A1 WO 1999055983 A1 WO1999055983 A1 WO 1999055983A1 DE 9901236 W DE9901236 W DE 9901236W WO 9955983 A1 WO9955983 A1 WO 9955983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flat material
- membrane
- material according
- film
- water vapor
- Prior art date
Links
Classifications
-
- 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
- E04D12/002—Sheets of flexible material, e.g. roofing tile underlay
Definitions
- the invention relates to waterproof, water vapor-permeable flat material, in particular for a sarking membrane for a sloping roof, comprising at least one film provided with micropores.
- Such flat material is also used, for example, for the production of clothing, hygiene articles, such as diapers or the like, or cover material.
- a sarking membrane which consists of a polyurethane film covered on one side with a nonwoven layer.
- the waterproof water vapor permeable polyurethane film is so thick in the known underlay for reasons of mechanical strength that only a water vapor permeability of about 150 to 140 g per square meter is achieved in 24 hours.
- DE-A 44 37 521 describes a sarking membrane which has a three-layer structure with a film-like water vapor-permeable, water-impermeable barrier layer embedded on both sides between and connected to two nonwoven layers and having a thickness in the range of preferably 30 to 50 ⁇ m.
- water vapor permeable water-impermeable layer to achieve a sufficient mechanical Stability must be relatively thick so that it opposes diffusion with a corresponding resistance.
- the object of the present invention is to provide a flat material of the type described at the outset, which is mechanically stable, has a high water vapor permeability, but is also impervious to relaxed water, for example water mixed with detergents.
- the film is open-pore, that the thickness of the film is less than 100 microns, that at least in the area of the micropores, a waterproof membrane covering this is provided, through which water vapor can diffuse, and that the thickness of the membrane is less than 50 ⁇ m.
- the microporous film has pores that pure water does not let through due to its surface tension, but water vapor does. Because the pores are covered with a membrane, the film can have numerous relatively large pores. The membrane can be very thin because it only has to seal in the area of the pores. Therefore, it offers only a slight resistance to water vapor diffusion.
- the flat material according to the invention can be produced in a simple manner if the film is designed as a stretched film containing microlithic solids.
- the film is stretched after production, with pores tearing open in the area of the solids. Depending on whether stretching is carried out in one or two directions perpendicular to one another, slit-like or round pores are formed.
- the size of the pores can be influenced by the extent of the stretching.
- the microlithic solids in the film are advantageously inorganic fillers.
- the film can contain hydrophobic additives.
- a nonionic fluorinated resin, in particular FX-1801 from the manufacturer 3M, is suitable as a hydrophobizing additive.
- the film of the flat material can contain polyethylene and / or polypropylene, so that it is inexpensive.
- Adequate mechanical stability is achieved if the thickness of the film is 20 to 50 ⁇ m.
- the combination of a microporous film known per se with a water vapor diffusion permeable membrane known per se has the advantage that water containing detergents cannot penetrate through the micropores and that the membrane can be very thin because it itself has only a very small area must cover a pore and thus only has to have sufficient mechanical strength. Therefore, the water vapor diffusion permeable membrane can be very thin, so that it has a high water vapor diffusion permeability.
- the diffusion time is proportional to the square of the layer thickness. The rate of diffusion increases inversely proportional to the square of the layer thickness. In other words, four times as much water vapor can diffuse through a membrane half as thick in a given period of time.
- the membrane is permeable to water vapor diffusion if it is a polyamide copolymer, polyethylene vinyl acetate,
- the membrane can contain a mixture or a copolymer of at least two of the above-mentioned polymers.
- a high water vapor diffusion permeability of the membrane is achieved if its thickness is less than 20 ⁇ m.
- the flat material can be produced in that the membrane is applied to the film by extrusion coating.
- the membrane can also be applied to an undrawn film and stretched together with it, micropores being formed in the film and the membrane retaining its closed structure due to its extensibility.
- the membrane and film can be produced by coextrusion and stretched together with it.
- the film and the membrane can also be glued to one another.
- the membrane can be made particularly thin and thus have a very high water vapor diffusion permeability if a membrane is arranged on the top and the bottom of the film.
- Reinforcement layer has, such as a net, a grid, a scrim, a fabric, a nonwoven or the like.
- the reinforcing layer is advantageously arranged between the film and the membrane.
- the reinforcing layer can form a composite with a film and the membrane and can be stretched together with these.
- the flat material additionally has a protective layer, in particular a hydrophobic fleece. 5
- Fig. 1 shows a flat material according to the invention in section.
- Fig. 2 shows the flat material from Fig. 1 with a protective layer of non-woven material in section.
- a flat material 10 according to the invention is shown schematically in section.
- the flat material 10 has a 50 ⁇ m thick film 12 made of polyethylene, which has micropores 14, 16, 18, 20.
- the film 12 and the micropores 14, 16, 18, 20 are covered with an extruded 10 ⁇ m thick membrane made of water vapor diffusion-permeable polyurethane.
- Fig. 2 the flat material 10 from Fig. 1 is shown schematically in section, on which a protective layer 24 made of polypropylene nonwoven is applied to the top of the membrane 22.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99929025A EP1075575A1 (de) | 1998-04-29 | 1999-04-23 | Wasserdichtes wasserdampfdurchlässiges flachmaterial |
PL99344138A PL344138A1 (en) | 1998-04-29 | 1999-04-23 | Watertight, water vapor-permeable flat material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998119085 DE19819085A1 (de) | 1998-04-29 | 1998-04-29 | Wasserdichtes wasserdampfdurchlässiges Flachmaterial |
DE19819085.9 | 1998-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999055983A1 true WO1999055983A1 (de) | 1999-11-04 |
Family
ID=7866124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001236 WO1999055983A1 (de) | 1998-04-29 | 1999-04-23 | Wasserdichtes wasserdampfdurchlässiges flachmaterial |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1075575A1 (de) |
DE (1) | DE19819085A1 (de) |
PL (1) | PL344138A1 (de) |
WO (1) | WO1999055983A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008059815A1 (de) | 2008-12-01 | 2010-06-10 | Monier Roofing Components Gmbh & Co. Kg | Unterspannbahn |
DE102017004350A1 (de) * | 2017-05-08 | 2018-11-08 | Ewald Dörken Ag | Nageldichte Unterdachbahn |
US20200399904A1 (en) * | 2019-06-24 | 2020-12-24 | Owens Corning Intellectual Capital, Llc | Roofing underlayment with hydrophobic nonwoven core |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10116477B4 (de) * | 2001-04-03 | 2004-12-23 | Peter Wirz | Dampfdiffusionsoffene und wasserdichte Dachunterspannbahn |
DE50200867D1 (de) * | 2002-05-14 | 2004-09-23 | Noetzli Rolf | Feuchteschutz mit Winddichtung für Gebäude |
EP1632345A3 (de) | 2004-09-06 | 2008-05-21 | Silu Verwaltung AG | Mehrschichtfolie mit einstellbarer Wasserdampfdurchlässigkeit |
EP2065534A1 (de) * | 2007-11-30 | 2009-06-03 | Fiberweb Berlin GmbH | Baumaterial aufweisend ein Langzeit-UV-stabilisiertes Lagenmaterial |
AT10699U1 (de) | 2008-04-28 | 2009-08-15 | Villas Austria Gmbh | Unterlagsbahn zur herstellung der regensicherheit eines unterdachaufbaus |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4302496A (en) * | 1980-10-21 | 1981-11-24 | Albany International Corp. | Composite waterproof and flame resistant fabrics |
DE3425795C2 (de) | 1984-07-13 | 1987-01-02 | Ewald Doerken Gmbh & Co Kg, 5804 Herdecke, De | |
EP0169308B1 (de) | 1984-07-13 | 1989-06-14 | Ewald Dörken GmbH & Co. KG | Unterspannbahn aus Kunststoff |
DE4437521A1 (de) | 1994-10-20 | 1996-04-25 | Doerken Ewald Ag | Unterspannbahn, insbesondere für geneigte, wärmegedämmte Dächer |
EP0742305A1 (de) * | 1995-05-03 | 1996-11-13 | DON & LOW NONWOVENS LIMITED | Durchlässige Stoffe |
EP0757139A1 (de) * | 1995-02-17 | 1997-02-05 | Japan Gore-Tex, Inc. | Feuchtigkeitsdurchlässige folie aus verbundmaterial für das wasserdichtmachen von beton |
DE29700987U1 (de) * | 1997-01-22 | 1997-04-03 | Wirz Peter | Diffussionsoffene Dachunterspannbahn mit innerer Folienschicht |
US5650225A (en) * | 1994-05-06 | 1997-07-22 | W. L. Gore & Associates, Inc. | Three-dimensional, seamless waterproof breathable flexible composite material |
DE19754251A1 (de) * | 1997-12-06 | 1999-06-17 | Coronor Composites Gmbh | Kunststoffolie, welche wasserdicht und wasserdampfdurchlässig ist |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9311092D0 (en) * | 1993-01-28 | 1993-07-14 | Du Pont Int | Extrusion process |
US5529830A (en) * | 1994-05-25 | 1996-06-25 | W. L. Gore & Associates, Inc. | Two-way stretchable fabric laminate and articles made from it |
DE19526044C2 (de) * | 1995-07-17 | 1999-03-18 | M & W Verpackungen Gmbh | Flauschige Verbundfolie und Verfahren zur Herstellung einer solchen Verbundfolie |
CZ297188B6 (cs) * | 1996-05-29 | 2006-09-13 | E. I. Du Pont De Nemours And Company | Kombinovaný plochý materiál propustný pro vodní páry a zpusob výroby prodysného kombinovaného plochého materiálu |
-
1998
- 1998-04-29 DE DE1998119085 patent/DE19819085A1/de not_active Withdrawn
-
1999
- 1999-04-23 EP EP99929025A patent/EP1075575A1/de not_active Withdrawn
- 1999-04-23 PL PL99344138A patent/PL344138A1/xx not_active IP Right Cessation
- 1999-04-23 WO PCT/DE1999/001236 patent/WO1999055983A1/de not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4302496A (en) * | 1980-10-21 | 1981-11-24 | Albany International Corp. | Composite waterproof and flame resistant fabrics |
DE3425795C2 (de) | 1984-07-13 | 1987-01-02 | Ewald Doerken Gmbh & Co Kg, 5804 Herdecke, De | |
EP0169308B1 (de) | 1984-07-13 | 1989-06-14 | Ewald Dörken GmbH & Co. KG | Unterspannbahn aus Kunststoff |
US5650225A (en) * | 1994-05-06 | 1997-07-22 | W. L. Gore & Associates, Inc. | Three-dimensional, seamless waterproof breathable flexible composite material |
DE4437521A1 (de) | 1994-10-20 | 1996-04-25 | Doerken Ewald Ag | Unterspannbahn, insbesondere für geneigte, wärmegedämmte Dächer |
EP0757139A1 (de) * | 1995-02-17 | 1997-02-05 | Japan Gore-Tex, Inc. | Feuchtigkeitsdurchlässige folie aus verbundmaterial für das wasserdichtmachen von beton |
EP0742305A1 (de) * | 1995-05-03 | 1996-11-13 | DON & LOW NONWOVENS LIMITED | Durchlässige Stoffe |
DE29700987U1 (de) * | 1997-01-22 | 1997-04-03 | Wirz Peter | Diffussionsoffene Dachunterspannbahn mit innerer Folienschicht |
DE19754251A1 (de) * | 1997-12-06 | 1999-06-17 | Coronor Composites Gmbh | Kunststoffolie, welche wasserdicht und wasserdampfdurchlässig ist |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008059815A1 (de) | 2008-12-01 | 2010-06-10 | Monier Roofing Components Gmbh & Co. Kg | Unterspannbahn |
DE102008059815B4 (de) * | 2008-12-01 | 2014-07-10 | Monier Roofing Components Gmbh | Unterspannbahn |
DE102017004350A1 (de) * | 2017-05-08 | 2018-11-08 | Ewald Dörken Ag | Nageldichte Unterdachbahn |
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 |
---|---|
PL344138A1 (en) | 2001-10-08 |
EP1075575A1 (de) | 2001-02-14 |
DE19819085A1 (de) | 1999-11-11 |
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