DE20314060U1 - - Damp-proof membrane for floating laminate floors comprises resilient, perforation-resistant bas layer and moisture-impermeable top layer - Google Patents

Abstract

Damp-proof membrane for floating laminate floors (P) comprises a resilient, perforation-resistant base layer (FT1) and a moisture-impermeable top layer (FT2) : An independent claim is included for a floating laminate or parquet floor fitted on the membrane.

Description

GKS & S MAXIMIUANSTRASSE 58 D-80538 MUNICH GERMANY

Applicant:

HAJKAN GMBH

WEIDENWAY 3a

84177 GOTTFRIEDINGER-SCHWAIGE

LAWYERS

MUNICH

DR. HELMUT EICHMANN

GERHARD BARTH

DR. ULRICH BLUMENRÖDER, LLM.

CHRISTA NIKLAS-FALTER

DR. MAXIMILIAN KINKELDEY, LL. M.

DR. KARSTEN BRANDT

ANJA FRANKE, LL.M.

UTE STEPHANI

DR. BERND ALLEKOTTE, LLM.

DR. ELVIRA PFRANG, LL. M.

KARIN LOCHNER

BABETT ERTLE

CHRISTINE NEUHIERL

SABINE PRÜCKNER

YOUR REF.

OUR REF.

G5105-08025/SÜ

PATENT ATTORNEYS

EUROPEAN PATENT ATTORNEYS

MUNICH

DR. HERMANN KINKELDEY

PETER H. JAKOB

WOLFHARD MEISTER

HANS HILGERS

DR. HENNING MEYER-PLATH

ANNE EHNOLD

THOMAS SCHUSTER

DR. KLARA GOLDBACH

MARTIN AUFENANGER

GOTTFRIED KLITSCH

DR. HEIKE VOGELSANG-WENKE

REINHARD KNAUER

DIETMAR KUHL

DR. FRANZ-JOSEF ZIMMER

BETTINA K. REICHELT

DR. ANTON K. PFAU

DR. UDO WEIGELT

RAINER BERTRAM

JENS KOCH, M.S. (U of PA) M.S.

BERND ROTHAEMEL

DR. DANIELA KINKELDEY

THOMAS W. LAUBENTHAL

DR. ANDREAS KAYSER

DR. JENS HAMMER

DR. THOMAS EICKELKAMP

JOCHEN KILCHERT

DR. THOMAS FRIEDE

PATENT ATTORNEYS

EUROPEAN PATENT ATTORNEYS

BERLIN

PROF. DR. MANFRED BÖNING

DR. PATRICK ERK, M.S. (MIT)

COLOGNE

DR. MARTIN DROPMANN

CHEMNITZ

MANFRED SCHNEIDER

OF COUNSEL PATENT ATTORNEYS

AUGUST GRÜNECKER DR. GUNTER BEZOLD DR. WALTER LANGHOFF

DR. WILFRIED STOCKMAIR (-1996)

DATE

10.09.2003

Barrier film and floating flooring

GRÜNECKER-KINKELDEY ;·

STOCKMAIR & SCHWANHÄUSSEf MAXIMILIANSTR. 58 I,

D-80538 MUNICH
GERMANY

•_#wi·.;+49,«89;21 23 5.O·. .·· ,··. ; ; _# £>eutsche bank Munich

: fax+49:82^20287: :··.: : : : "t>°- 1751734

.* ft** +49519 2i 86 <fce3 ·.."...· *..· .PJnZ 700 700

http://www.grunecker.de SWIFT: DEUT DE MM

e-mail: info@grunecker.de

Barrier film and floating flooring

The invention relates to a barrier film according to the preamble of claim 1 and a floating floor covering according to the preamble of claim 11.

When laying laminate or prefinished parquet flooring on a rough subfloor, for example, with impact sound and/or room sound insulation, a barrier film is usually laid tightly on the subfloor to protect against rising damp. This barrier film provides a predetermined water vapor diffusion resistance. The barrier film is a PE film approximately 200 μm thick with a water vapor diffusion resistance > 100. Since the installation staff must step on the barrier film when laying the barrier film and the laminate or prefinished parquet flooring, and later work on the laid laminate or prefinished parquet flooring, perforations in the barrier film cannot be avoided due to raised areas, roughness or dirt on the subfloor. The required protection against rising damp is then no longer guaranteed. This also applies to other floating floor coverings, such as non-glued carpets, fiberboard and the like.

The invention is based on the object of specifying a barrier film and a floating floor covering with which the required protection against rising moisture is reliably guaranteed.

The stated problem is solved with the features of claim 1 and the independent claim 11.

The tough, elastic and perforation-resistant first and relatively strong film part of the composite film absorbs bumps caused by the roughness of the substrate and also dirt particles that have remained lying around without being perforated. Since the second film part is protected against harmful mechanical influences by the first film part and essentially only has to provide the required water vapor diffusion resistance, the second film part can be significantly thinner than the previously usual barrier film. Thanks to the first film part, the composite film is relatively

stable and easy to lay. It is supplied in rolls of 1.0 m width and 30 linear meters length, for example, and can be easily cut to the correct size, and can even improve the feel when walking and the impact sound and room sound characteristics of the floating floor covering. The composite film is particularly useful for laminate or prefinished parquet that may have impact sound and/or room sound lamination or is laid on soundproofing material.

In a practical embodiment, the first film part is a plastic foam layer, preferably with a density of between about 15 and 100 kg/m ³ , with a density of about 25 kg/m ³ being preferred. The plastic foam layer is not perforated when walked on or later under the load of the floor covering, even when the parquet is moving, but compensates for elevations on the subfloor or remaining dirt without endangering the second film part.

A foam layer made of PE foam or Styrofoam is cost-effective and durable. However, if desired for other reasons, other types of plastic can also be used, provided they are able to form a tough, elastic and penetration-resistant foam.

In a practical design, the plastic foam layer is colored. This makes the work easier for the parquet fitter because it visually indicates which side is to be laid on the subfloor.

The first film part preferably has a thickness of about 0.5 to 5.5 mm, whereby a thickness of 1.0 mm meets the requirements well.

In an alternative embodiment, the first film part can also consist of cork or natural fibers, or of another tough, elastic and perforation-resistant material.

In an expedient embodiment, an adhesive connection is provided between the first and second film parts, preferably via an LDPE adhesive layer which has been activated for bonding by coextrusion of the film parts or by a thermal treatment.

In an advantageous embodiment, the second film part is an aluminized plastic film, preferably with a thickness of between about 1.0 and 40.0 μm, preferably about 12.0 pm. The plastic film is aluminized, for example, by laser treatment and has the usual radiant appearance of aluminum. The combination of the plastic layer with the aluminum ensures the predetermined water vapor diffusion resistance, for example > 100, despite the relatively thin thickness of the second film part.

In an alternative embodiment, the second film part is a plastic film, e.g. in a transparent setting, with a separate aluminum foil, wherein, preferably, the aluminum foil is arranged between the plastic film and the first film part. The plastic film and the aluminum foil can be connected to one another via an adhesion promoter.

The plastic film of the second film part is preferably made of PET. Alternatively, PP, HDPE ₁ PE or another plastic material, or mixtures of such plastics, could be used. A transparent setting of the plastic film is advantageous because it allows the desirable appearance of the aluminum to remain visible. An important aspect is that the plastic film has a relatively scratch-resistant surface.

In a preferred embodiment of the floating floor covering, e.g. made of laminate or prefabricated parquet, a composite film is tightly laid as a barrier film, the perforation-resistant first film part of which is a foam layer, preferably made of PE, with a thickness of between about 0.5 and 5.5 mm, preferably of about 1.0 mm, and a density of between about 15 and 100 kg/m ³ , preferably of about 25 kg/m ³ , in which the second film part is an aluminized plastic film, preferably made of PET, HDPE, PP, PE, with a thickness of between about 1.0 and 40.0 μm, preferably of

·

·

about 12.0 pm, and in which the film parts are connected to one another via an adhesive layer, preferably made of LDPE, which is bonded by coextrusion or another thermal activation.

In order to prevent moisture bridges in joint areas between adjacent composite films, the edge areas can be taped off with an aluminum adhesive strip or with an adhesive area that is created to overlap an edge strip of the second film part that is cut out from the first film part.

The rough substrate of the floor covering is a screed, consists of wood or chipboard etc.

If necessary, the first and second foil parts can even be laid separately.

Embodiments of the subject matter of the invention are explained using the drawing. They show:

Fig. 1 shows a cross-section through a floating floor covering containing a composite film as a barrier film,

Fig. 2 a cross-section through another embodiment of the composite films,

Fig. 3 a taped joint area between adjacent composite films,

and

Fig. 4 a taped joint area between adjacent composite films,

For the sake of better understanding, strength ratios are only shown schematically in the figures.

A floating floor covering on a substrate U shown in Fig. 1 consists, for example, of laid laminate or prefinished parquet, of which individual, one

Components P forming the butt joint 1 are each shown with an impact sound and/or room sound lamination S, and which are laid on the substrate U with an intermediate layer of a composite film AP, for example on a screed, on wood or on chipboard. The substrate U is rough and shows, for example, small elevations 2 or remaining dirt particles. Instead of the lamination S, a separate soundproofing layer could be laid. Instead of laminate or prefinished parquet, a carpet or a fiberboard layer or the like could also be laid.

The AP composite film serves a dual purpose. On the one hand, it provides a predetermined water vapor diffusion resistance, e.g. > 100, to protect against rising damp. On the other hand, the AP composite film is designed in such a way that it is not perforated by the elevations 2 of the rough substrate U, but rather absorbs these elevations in order to ensure the predetermined water vapor diffusion resistance even after the flooring has been laid and walked on by the floor fitter and during long-term use of the floor covering.

The composite film AP consists of a first film part FT1, which rests on the substrate U, and, in Fig. 1, a second, overlying film part FT2, which lies under the room sound and impact sound lamination S, if this is provided.

The AP composite film is delivered in rolls of 1.0 m width and 30 linear meters length, for example, and is laid tightly before the floor covering is laid. The resulting joint areas T are taped off, for example, as shown in Fig. 3 or Fig. 4.

The first film part FT1 is, for example, a plastic foam layer 6 with a thickness of, for example, 1.0 mm (dimension X) and preferably consists of a PE foam plastic with a density of about 25 kg/m ³ . The consistency of the first film part FT1 is tough-elastic and perforation-resistant. Instead of a plastic foam layer 6, as shown, a cork or natural fiber or polystyrene layer could also be provided, for example.

The second film part FT2 is a plastic film 3, for example blown or extruded from PET, which is aluminized by laser treatment and contains aluminum 4. The thickness of the plastic film 3 is, for example, approximately 12 μm (dimension Y).

The aluminized plastic film 3 is connected to the foam layer 6 via an adhesive layer 5, for example a thin layer of LDPE, which is bonded by thermal activation or by coextrusion of the two film parts.

Under the pressure of the floor covering or when directly walked on during installation, the elevations 2 penetrate into the foam layer 6, forming almost crater-shaped depressions 7, but without perforating it. The foam material simply gives way without being significantly damaged.

Alternatively, PP ₁ HDPE, PE or other types of plastic could be used for the plastic film 3.

The composite film AP in Fig. 2 differs from that shown in Fig. 1 in that in the second film part FT2, instead of an aluminized plastic film 3, a pure plastic film 3, for example made of PET in a transparent setting, is connected to an aluminum foil 8, which in turn is applied to the foam layer 6 (or the cork, the polystyrene or the natural fibers) as the first film part FT1.

In order to prevent moisture or vapor bridges from forming, joint areas T between adjacent composite films AP are taped as shown in Fig. 3 and 4.

In Fig. 3, an edge strip R of the plastic film 3 or the aluminized plastic film 3 of a web 9 protrudes over the foam layer 6. The edge strip R is connected to the plastic film 3 of the adjacent composite film web 10 in an overlapping manner by an adhesive layer K. Alternatively, protruding edge strips R could also be provided on both longitudinal edges of the composite film webs 9, 10 for overlapping butt taping.

In Fig. 4, the two composite film webs 9, 10 are tightly bonded in the butt joint T by means of an aluminum adhesive strip 11 through an adhesive area K.

Since the first film part FT1 offers sufficient mechanical strength against perforations and reinforces the second film part, the second film part FT2 can have a relatively low thickness Y between about 1.0 and 40.0 μm, e.g. 12 pm, whereby the predetermined water vapor diffusion resistance, e.g. > 100, arises from the combination of the thin plastic film and the aluminum. The significantly greater thickness X of the first film part FT1 may also improve the impact sound and room sound behavior of the floor covering. In addition, the composite film AP is relatively stable, which makes it easier to lay and suppresses the formation of folds. In the edge area of the floor covering, the composite film AP can be folded upwards and then fixed and hidden behind a skirting board, for example.

Other materials are also suitable for the first film part FT1, provided they are able to provide sufficient tough, elastic and perforation-resistant properties for such floor coverings laid on rough surfaces. The composite film AP can be manufactured using a coextrusion process, or made from individual film strips by bonding them together or in another way. If necessary, the two film parts can even be laid separately on top of each other.

Claims (17)

1. Barrier film for a floating floor covering, in particular made of laminate or prefinished parquet laid on a rough subsurface, such as screed, wood or chipboard, characterized in that the barrier film is a composite film (AP) made of a tough-elastic and perforation-resistant first film part (FT1) on the subsurface side and at least one second film part (FT2) on the parquet side which offers a predetermined water vapor diffusion resistance. 2. Barrier roll according to claim 1, characterized in that the first film part (FT1) is a plastic foam layer ( 6 ), preferably with a density between about 15 to 100 kg/m ³ , preferably of about 25 kg/m ³ . 3. Barrier film according to claim 2, characterized in that the first film part (FT1) comprises PE foam. 4. Barrier film according to claim 2, characterized in that the plastic foam layer ( 6 ) is colored. 5. Barrier film according to claim 1, characterized in that the first film part (FT1) has a thickness (X) of about 0.5 to 5.5 mm, preferably of about 1.0 mm. 6. Barrier film according to claim 1, characterized in that the first film part (FT1) comprises cork or natural fibers or polystyrene. 7. Barrier film according to at least one of the preceding claims, characterized in that an adhesive connection is provided between the first and second film parts, preferably via an LDPE adhesive layer ( 5 ) which is activated for bonding, preferably by co-extrusion or a thermal treatment. 8. Barrier film according to claim 1, characterized in that the second film part (FT2) is an aluminized plastic film ( 3 ), preferably with a thickness (Y) between 1.0 and 40.0 µm, preferably of about 12.0 µm. 9. Barrier film according to claim 1, characterized in that the second film part (FT2) comprises a plastic film ( 3 ) and an aluminum foil ( 8 ), and that, preferably, the aluminum foil ( 8 ) is arranged between the plastic film ( 3 ) and the first film part (FT1). 10. Barrier film according to claim 8 or 9, characterized in that the plastic film ( 3 ) consists of PET, PP, HDPE, PE, preferably with a transparent setting. 11. Floating floor covering, in particular made of laminate or prefinished parquet (P); which is laid on a rough subfloor (U) with an intermediate layer of a barrier film which provides a predetermined water vapor diffusion resistance, characterized in that the barrier film is a composite film (AP) made of a tough-elastic and perforation-resistant first film part (FT1) on the subfloor side and at least one second film part (FT2) on the parquet side which provides the predetermined water vapor diffusion resistance. 12. Floating floor covering according to claim 10, characterized in that the perforation-resistant first film part (FT1) is a foam layer ( 6 ), preferably made of PE or Styrofoam, with a thickness (X) between about 0.5 to 5.5 mm, preferably of about 1.0 mm, and a density of about 15 to 100 kg/m ³ , preferably of about 25 kg/m ³ , preferably made of a plastic foam using mainly PE or Styrofoam, that the second film part (FT2) is an aluminized plastic film ( 3 , 4 ), preferably made of PET, HDPE, PP, PE, with a thickness of about 1.0 to 40.0 µm, preferably of about 12.0 µm, and that the film parts are connected to one another via a thermally activated adhesive layer ( 5 ), preferably made of LDPE. 13. Floating floor covering according to claim 11, characterized in that film edges of butted composite films (AP) are taped off by an aluminum adhesive tape ( 11 ). 14. Floating floor covering according to claim 11, characterized in that film edges of adjacent barrier films (AP) overlap one another, that at least one film edge is provided with an adhesive strip (K), preferably in an edge strip (R) of the second film part (FT2) recessed from the first film part (FT1), and that the overlapped film edges are taped over the adhesive strip (K). 15. Floating floor covering according to claim 11, characterized in that the rough substrate (U) is a screed, a wooden floor or is made of chipboard. 16. Floating floor covering according to claim 11, characterized in that the barrier strip (AB) has a water vapor diffusion resistance greater than 10, preferably greater than 100. 17. Floating floor covering according to at least one of claims 11 to 16, characterized in that a room sound and/or impact sound layer (S) is provided, preferably laminated, under the laminate or prefinished parquet.