DE202018102343U1 - moist barrier - Google Patents

Abstract

Moisture barrier (2) for building waterproofing against moisture, formed from: at least one moisture-impermeable and / or vapor-barrier separating layer (6) of aluminum, at least one protective layer (4) connected to the separating layer (6), and at least one external layer connected to the separating layer (6) Nonwoven layer (10).

Description

The invention relates to a moisture barrier for sealing structures against moisture.

In construction, the seal plays against moisture, e.g. against non-pressing water, an important role. For the protection of floor slabs and walls against damaging water absorption or water diffusion water-repellent seals are applied in foil form as a moisture barrier. In or under walls, e.g. PVC films or bitumen cardboard arranged as moisture barriers.

It is an object of the invention to provide an improved moisture barrier against moisture and water in buildings or an arrangement with such a moisture barrier.

This object is achieved with the features of claim 1 and 19, respectively.

Advantageous embodiments are the subject of the dependent claims.

According to claim 1, a moisture barrier or a multi-layer composite seal for sealing against moisture and / or as a moisture barrier is provided. The moisture barrier is formed from at least one moisture-impermeable and / or vapor-barrier separating layer of aluminum, at least one protective layer connected to the separating layer and at least one outer non-woven layer connected to the separating layer. The moisture barrier is preferably used for horizontal seals such as e.g. used on a raw concrete ceiling under a release coat screed

The nonwoven layer protects the aluminum release liner from mechanical damage and additionally provides a well-adherent surface, e.g. for mortar such as masonry mortar or plaster. Due to the aluminum separating layer, the moisture barrier has an sd value> 1500 m. Furthermore, the use of aluminum (instead of, for example, bitumen board), the moisture barrier has a low basis weight, so that the moisture barrier is easy to handle. In contrast to bitumen or PVC, in particular aluminum is considerably less sensitive to temperature and remains flexible even at temperatures down to -5 ° C, so that the moisture barrier can be processed very well even at low temperatures. For example, it is possible to fold the moisture barrier up to a temperature of -20 ° C. In particular, connections to existing sealing levels or masonry can be easily formed by the flexibility of the moisture barrier. In particular, the moisture barrier is compatible with bitumen and / or PVC and can be easily connected or glued to these materials.

According to a preferred embodiment, the release liner has a basis weight in the range of 10 g / m ² - 30 g / m ² , preferably in the range of 13 g / m ² - 24 g / m ² and particularly preferably 18 g / m ² - 22 g / m ² , and / or the separating layer has a thickness in the range of preferably 5 .mu.m-10 .mu.m, preferably in the range of 6 .mu.m-9 .mu.m and particularly preferably 7 .mu.m-8 .mu.m. Despite the low thickness separation layer, the moisture barrier has a high sd value> 1500m, whereby the moisture barrier is cost-effective due to the low material usage.

The individual layers of the moisture barrier can be connected to one another in various ways. Bonding, laminating, spraying, fusing, concatenating or melt pressing is particularly advantageous. In this case, different methods can be used to connect the individual layers together.

The at least one separating layer and the at least one nonwoven layer are preferably connected by means of adhesive or an adhesive layer. For example, an acrylate adhesive may be used, alternatively, hot melt adhesives, so-called hot melt adhesives, may be used. For example, the adhesive layer has a basis weight in the range of 10 g / m ² - 20 g / m ² , preferably a basis weight of or about 10 g / m ² .

According to one embodiment, the nonwoven layer on a pattern embossing, especially canvas embossing on. The structure embossing stabilizes / stiffens the moisture barrier, so that it is easier to handle during processing.

Preferably, the nonwoven layer is thermally bonded and in particular has a binder and / or binder fibers. By means of thermal consolidation, the bonding strength of the individual fibers of the nonwoven layer is considerably increased, so that lighter nonwovens can be constructed with the same strength. For example, the at least one nonwoven layer of polypropylene (PP), polyethylene (PE), polyester, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or polyamide (PA) is formed, wherein preferably the nonwoven layer is formed as a spunbonded nonwoven. Alternatively or additionally, the at least one nonwoven layer may be formed from vegetable fibers, cellulose fibers, recycled fibers and / or polymer fibers or may comprise such fibers.

Preferably, the at least one nonwoven layer has a density in the range of 15 g / m ² - 80 g / m ² , preferably in the range of 25 g / m ² - 60 g / m ² and particularly preferably in the range of 35 g / m ² - 50 g / m ² on, and / or the at least one nonwoven layer has a thickness in a range of 0.1 to 1 mm, preferably in the range of 0.2 to 0.8 mm and particularly preferably 0.3 to 0.6 mm.

Preferably, the at least one protective layer is alkali-resistant, so that the protective layer protects the non-alkali-resistant aluminum from damage. Particularly preferably, a protective layer is arranged on both sides or on the upper and lower sides of the aluminum separating layer so that the separating layer is protected against damage on both sides.

The protective layer is preferably made of plastic, in particular of polyolefin, polyethylene terephthalate (PET) or of a PET film or of high-density polyethylene (HDPE). The density of HDPE is in the range of 0.94 g / cm ³ to 0.97 g / cm ³ .

The protective layer may have a basis weight in the range of preferably 14 g / m ^{2 to} 71 g / m ² , preferably in the range of 14 g / m ^{2 to} 50 g / m ² and particularly preferably in the range of 14 g / m ^{2 to} 30 g / m ² . In particular, the protective layer may have a thickness in the range of preferably 10 μm-50 μm, preferably 10 μm-30 μm and particularly preferably in the range of 12 μm-20 μm. For example, a protective layer of PET has an areal density of 17 g / m ² or a thickness of 12 μm. The use of PET offers the further advantage that the density of the moisture barrier against moisture is increased. In particular, when using a protective layer made of PET with a larger surface density or a thicker / stronger protective layer, the areal density (thickness) of the aluminum separating layer can be reduced without reducing the sd value of the moisture barrier. Alternatively, the protective layer of a polyolefin melt with a basis weight between 30 g / m ² - 50 g / m ² , preferably 40 g / m ^{2 be} formed.

Preferably, the moisture barrier is web-shaped, so that it can be easily transported and processed as a roll product. For example, the moisture barrier can be provided as a roll product with a width of 10 cm - 100 cm. Preferably, the web width is in the range of 10 to 15 cm, 15 to 25 cm, 30 to 50 cm or 75 to 100 cm.

For connecting individual adjacent web-like moisture barriers (in the longitudinal direction), a first adhesive strip can be arranged in a side region on a first side of the moisture barrier and a second adhesive strip can be arranged on the opposite side region on the opposite second side of the moisture barrier. Ie. an adhesive strip is disposed on an upper side at a side portion of a barrier web, and a second adhesive strip is disposed on a lower surface at the other side portion of the waterproofing sheet. When joining two webs, the sides or side regions of the webs to be joined are arranged overlapping, so that the adhesive strips rest on the side regions of the webs. This provides a 'glue-on-glue' connection, which immediately creates a tight and well-adhered bond. This embodiment of the web-shaped barrier is particularly advantageous when used as a moisture barrier for sealing floor slabs, in which the barrier or seal between a raw concrete floor and a screed is laid to separate the screed from the supporting substrate. The damp barrier protects the screed against rising damp.

Preferably, the adhesive used for the adhesive strip is cold-tacky, in particular to -10 ° C processable. For example, the first and second adhesive strips of an acrylate adhesive are formed. Alternatively, a so-called hot melt adhesive based on synthetic resins may be used. Preferably, the adhesive strips have a basis weight in the range of 40-80 g / m ² , preferably in the range of 45-70 g / m ² , particularly preferably of about 50 g / m ² . The above-described (cross) adhesive strips may extend over the entire length or substantially the entire length (transverse to the web dimension) of a web-shaped moisture barrier, so that the side regions of the webs can be joined together in the longitudinal direction. In addition, (transverse) adhesive strips may be provided which extend over the entire width or substantially the entire width of the moisture barrier web, so that one end of a web can be glued together with the beginning of the next web. For example, the first adhesive strip on the upper side and / or the second adhesive strip on the lower side each have a width in a range of 2-5% of the total width of the web-shaped moisture barrier, preferably a width of or about 3% of the total width of the web-shaped moisture barrier. Additionally or alternatively, each adhesive strip has a width of 2 cm to 8 cm, preferably 3 cm to 5 cm.

Preferably, the first and second adhesive strips are each covered with a colored release liner or liner to protect the adhesive strips. The peel strips are peeled off or removed before gluing. The colored design makes it easier to recognize and remove the release strips.

The following example describes the installation of the moisture barrier. First, the individual webs are e.g. designed on a bottom plate and their end portions or transverse edges in the longitudinal direction as described above glued together. The webs are designed so that the longitudinal edges of adjacent webs e.g. overlap by about 5 cm, so that the adhesive strips rest on the side regions of the webs. After removing the pull-off strips, both adhesive surfaces lie on top of each other and form a well-adhering connection. Preferably, the moisture barrier or the moisture barrier webs are not completely bonded to a substrate (such as raw concrete).

The single FIGURE shows a schematic cross-sectional view, not to scale, of a web-shaped moisture barrier according to a preferred embodiment.

• - eine Schutzlage 4 aus (PET), z.B. mit einer Stärke von oder von etwa 12 µm,
• - ein feuchtigkeitsundurchlässige und/oder dampfsperrende Trennlage 6 aus Aluminium, z.B. mit einer Stärke von oder von etwa 7 µm,
• - eine Klebstoffschicht 8, z.B. Hotmelt-Klebstoff, mit einem Flächengewicht im Bereich von 10 - 20 g/m² oder von etwa 10 g/m²,
• - eine Vlieslage 10, z.B. aus Polyethylen (PE), mit einem Flächengewicht von oder von etwa 100 g/m².

The web-shaped moisture barrier 2 has the following interconnected layers from top to bottom:

• - a protective layer 4 made of (PET), eg with a thickness of or about 12 μm,
• - A moisture impermeable and / or vapor barrier release liner 6 made of aluminum, eg with a thickness of or about 7 μm,
• - An adhesive layer 8th , eg hotmelt adhesive, having a weight per unit area in the range of 10 to 20 g / m ² or of about 10 g / m ² ,
• - a nonwoven layer 10 , eg polyethylene (PE), having a basis weight of or about 100 g / m ² .

When using the moisture barrier 2 has the fleece layer 10 down or lying on a surface (eg floor or wall) and the protective layer 4 points upwards or is turned away from a background. Optionally, the moisture barrier path 2 Adhesive strips 12a, 12b, each along the edges or longitudinal edges of the web 2 are attached, so that an adhesive strip 12a on an upper side and an adhesive strip 12b on a lower side of the web 2 is arranged. When forming a flat sealing arrangement, individual webs 2 arranged side by side and overlapping, leaving adhesive strips 12a-b neighboring tracks 2 on top of each other and provide a good adhesive bond.

LIST OF REFERENCE NUMBERS

2

moisture barrier

4

protective layer

6

separating layer

8th

adhesive layer

10

nonwoven layer

12a-b

tape

Claims (21)

Moisture barrier (2) for building waterproofing against moisture, formed from: at least one moisture-impermeable and / or vapor-barrier separating layer (6) made of aluminum, at least one protective layer (4) connected to the separating layer (6), and at least one outer non-woven layer (10) connected to the separating layer (6). Moisture barrier after Claim 1 , wherein the separating layer (6) has a basis weight in the range of 10 g / m ² - 30 g / m ² , preferably in the range of 13 g / m ² - 24 g / m ² and particularly preferably in the range of 18 g / m ² - 22 g / m ² , and / or wherein the separating layer (6) has a thickness in the range of 5 microns - 10 microns, preferably in the range of 6 microns - 9 microns and more preferably in the range of 7 microns - 8 microns. Moisture barrier after Claim 1 or 2 , wherein the at least one separating layer (6), the protective layer (4) and the at least one nonwoven layer (10) are connected to one another by gluing, laminating, spraying, fusing, linking and / or melt pressing. Moisture barrier after Claim 1 . 2 or 3 wherein the at least one separating layer (6) and the at least one nonwoven layer (10) are adhesively bonded, and wherein the adhesive preferably has a basis weight in the range of 10 g / m ² - 20 g / m ² , preferably a basis weight of or of about 10 g / m ² . Moisture barrier according to one of the preceding claims, wherein the nonwoven layer (10) has a structure embossing, in particular linen embossing. Moisture barrier according to one of the preceding claims, wherein the nonwoven layer (10) is thermally bonded, and in particular comprises a binder and / or binder fibers. Moisture barrier according to one of the preceding claims, wherein the at least one nonwoven layer (10) of polypropylene (PP), polyethylene (PE), polyester, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) or polyamide (PA) is formed, preferably the nonwoven layer ( 10) is formed as a spunbonded fabric. Moisture barrier according to one of the preceding claims, wherein the at least one Nonwoven layer (10) made of vegetable fibers, cellulose fibers, recycled fibers and / or polymer fibers is formed. Moisture barrier according to one of the preceding claims, wherein the at least one nonwoven layer (10) has a basis weight in the range of 15 g / m ² -80 g / m ² , preferably in the range of 25 g / m ² -60 g / m ² and more preferably in the range of 35 g / m ² - 50 g / m ² . Moisture barrier according to one of the preceding claims, wherein the at least one nonwoven layer (10) has a thickness in a range of 0.1 to 1 mm, preferably from 0.2 to 0.8 mm and particularly preferably from 0.3 to 0.6 mm having. Moisture barrier according to one of the preceding claims, wherein the at least one nonwoven layer (4) is formed from a spunbonded nonwoven. Moisture barrier according to one of the preceding claims, wherein the at least one protective layer (4) is formed of an alkali-resistant material. Moisture barrier according to one of the preceding claims, wherein the protective layer (4) is formed of a plastic, in particular of polyolefin, polyethylene terephthalate (PET) or of high density polyethylene (HDPE) is formed. Moisture barrier according to one of the preceding claims, wherein the protective layer (4) has a basis weight in the range of 14 g / m ² - 71 g / m ² , preferably in the range of 14 g / m ² - 50 g / m ² and particularly preferably in the range from 14 g / m ^{2 to} 30 g / m ² , and / or wherein the protective layer (6a-b) has a thickness in the range of 10 μm-50 μm, preferably in the range 10 μm-30 μm and particularly preferably in the range 12 μm - has 20 microns. Moisture barrier according to one of the preceding claims, wherein the moisture barrier has no bitumen and / or PVC. Moisture barrier according to one of the preceding claims, wherein the moisture barrier (2) is web-shaped, and wherein a first adhesive strip (12a) is arranged in a side region on a first side of the moisture barrier web (2a) and a second adhesive strip (12b) is preferably arranged in an opposite side region on an opposite second side of the moisture barrier web (2), wherein in particular the or each adhesive strip (12a-b) extends over the entire length or substantially the entire length of the moisture barrier (2). Moisture barrier according to one of the preceding claims, wherein the moisture barrier (2) is arranged between a raw floor and a screed floor, and / or wherein the moisture barrier (2) is arranged in a wall, under a wall and / or on a side surface of a wall. Moisture barrier according to one of the preceding claims, wherein the outer nonwoven layer (10) facing down and / or to a side surface of a wall Flat sealing arrangement with at least two or more juxtaposed webs of moisture barriers (2) according to one of the preceding claims. Flat sealing arrangement according to Claim 19 , wherein adjacent webs are laid overlapping in its edge region, in particular with an overlap region of at least 40 mm, 60 mm, 80 mm, 100 mm or 120 mm and / or in particular with an overlap region of at most 120 mm, 100 mm or 80 mm. Flat sealing arrangement according to Claim 19 or 20 , wherein sealed with the sealing arrangement: a raw concrete floor (screed seal), a flat roof, a garage roof, a balcony, a terrace, a wet room (inner seal) or a basement.

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