DE202011051052U1 - Concrete protective film - Google Patents

Abstract

Composite mat for lining concrete walls, which has a textile layer (1) with loops (2) made of synthetic material, the loops (2) protruding from a first surface of the textile layer (1) and one on the second surface of the textile layer (1) synthetic protective film (3) is attached with a closed surface, characterized in that a foam layer (4) made of synthetic material is arranged between the textile layer (1) and the protective film (3).

Description

The invention relates to a composite mat for lining concrete walls, which has a textile layer with loops of synthetic material, wherein the loops protrude from a first surface of the textile layer and wherein on the second surface of the textile layer, a synthetic protective film is attached with a closed surface, and a method for producing such a composite mat.

Such composite mats are used to seal cast concrete structures in particular agricultural technology, eg. As stables, silos, slurry tank used so that liquids and gases can not attack the concrete walls.

Such composite mats are z. B. from the document EP 0 288 393 A1 known. The publication DE 10 2004 015 694 B4 describes such a composite mat, in which a provided with loop-shaped polypropylene wires or threads polypropylene top layer is fully bonded together with a sub-layer consisting of polypropylene, wherein the connection between the upper layer and lower layer in the hot-bonding process, wherein the still warm tough film of the lower layer directly after extrusion applied to the fabric material of the topsheet and incorporated into the fabric material. By bonding the film which has not yet hardened to the fabric, there is a risk that the penetration of the polypropylene material of the underlayer into the fabric of the topsheet and deformation of the backsheet will result in an inhomogeneous material thickness of the composite mat and the strength of the bond between the layers will vary locally ,

The object of the invention is to increase the resistance of the composite mat.

This object is achieved in that a foam layer of synthetic material is arranged between the textile layer and the protective film.

The interposition of a synthetic foam layer between the textile layer and the protective film on the one hand causes the durability of the bond is increased. In particular, when choosing a textile layer consisting of a ribbon fabric and a smooth protective film there is a risk that the adhesive does not adhere optimally to the two layers. Due to their gas inclusions, a foam layer usually has a higher porosity than the other two layers. This increases the holding forces developed by an applied adhesive.

In addition, the foam layer has a damping property, which absorbs the power transmission from the concrete to the protective film. The damping effect is additionally reinforced by the adhesive, which connects the textile layer with the protective film. The foam layer thus reduces the risk of damage to the protective film and thus increases the resistance of the composite mat.

In practice, the foam layer may be completely bonded to the surface of the textile layer. Further, it may be fully adhered to a surface of the protective film. The complete bonding leads to a solid bond of the layers of the composite mat.

Furthermore, the surface of the protective film bonded to the foam layer can be treated in such a way that its wettability with adhesive is increased. For this purpose, it may in particular be subjected to a corona treatment. In a corona treatment, a plastic film is passed over a roller, wherein an electrode connected to a corona generator is arranged above the roller. The electrode generates a corona discharge, which penetrates the surface of the film and increases the wettability of the film. An apparatus for performing a corona treatment is, for example, in the document DE 44 18 460 C2 described.

However, other methods are known which lead to an increase in wettability, such as a flame treatment, fluorination or plasma treatment. The aim of all these methods is to increase the polarity of the surface, which increases the wettability and affinity of the surface compared to liquid and pasty substances such as adhesive.

The loops may in practice consist of monofilament plastic yarn incorporated in the textile layer. In particular, the monofilament plastic yarn can be connected in the form of loops with the textile layer. In a tissue, the loops are encompassed by the mesh and locked to the tissue. The loops can also be connected by means of Rascheltechnik or other suitable technique with the textile layer.

As previously mentioned, the textile layer may in practice consist of a ribbon fabric, preferably of polypropylene. The foam layer may in practice consist of polyurethane. This adheres well to suitable adhesives and can be made with the required fine porosity.

Also, the adhesive for bonding the foam layer with the textile layer and / or the Protective film can be made of polyurethane. This adheres very well to a foam layer of polyurethane. The protective film may in practice consist of polypropylene and polyethylene.

The object underlying the invention can also be achieved by a method. For the purpose of possible follow-up of procedural claims in subsequent foreign applications, the method is disclosed as follows:
The object underlying the invention can be achieved by a method for producing a composite mat for lining concrete walls, in which a textile layer is provided with loops of synthetic material, wherein the loops protrude from a first surface of the textile layer, wherein a second surface the textile layer is bonded to a synthetic closed-surface protective film, characterized in that a foam layer of synthetic material is interposed between the textile layer and the protective film.

The inventive method, the process can be driven with a much lower contact pressure of the rollers than in the conventional Agrotel coating, so that the loop threads are not compressed so much, which in turn means that they anchor better in the concrete.

Preferably, the foam layer is glued over its entire surface with the surface of the textile layer.

Preferably, the foam layer is glued over its entire surface with a surface of the protective film.

Preferably, the surface of the protective film is treated prior to bonding to the foam layer such that its wettability with adhesive is increased.

Preferably, the surface of the protective film to be bonded to the foam layer is treated with a corona treatment.

Preferably, the loops of monofilament plastic yarn are incorporated into the textile layer.

An embodiment of the invention will be described below with reference to the accompanying drawings.

The drawing shows an enlarged sectional view of a composite mat according to the invention.

The cover layer forms a thin textile layer 1 , which is formed for example by a ribbon fabric. In the textile layer 1 are loops 2 incorporated, which protrude from the upper surface of the textile layer. The textile layer 1 can be very thin (a few tenths of a millimeter). The slings 2 are designed so that they are a few millimeters or centimeters above the surface of the textile layer 1 protrude. When applying concrete, the flowable concrete must flow around the loops, so that the composite mat is firmly connected to the concrete body over its entire surface after the concrete has set. The slings 2 opposite surface of the composite mat is covered by a protective film 3 made of synthetic material. The protective film may in practice consist of a 0.5 to 2.5 mm thick closed film of polypropylene or polyethylene.

Between the protective film 3 and the textile layer 1 is a foam layer 4 arranged, which may for example consist of polyurethane. The foam layer 4 may be formed similarly thin as the textile layer, with its thickness in the range of 2 to 3 millimeters. In the production of the composite mat according to the invention, an adhesive is applied completely to the surface of the protective film, onto which layer the foam layer subsequently 4 is hung up. Subsequently, the foam layer 4 applied an adhesive on which the loops 2 opposite side of the textile layer 1 is hung up.

As the adhesive, for example, a polyurethane adhesive which produces a very high bond between the synthetic layers can be used.

Since the protective film often has low wettability and therefore only insufficient adhesiveness, it can be made wettable by a suitable method prior to bonding. Here, for example, offers a corona treatment, which through in the surface of the protective film 3 penetrating electrical discharges makes this surface wettable.

LIST OF REFERENCE NUMBERS

1

textile layer

2

wrap

3

protector

4

foam layer

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0288393 A1 [0003]
• DE 102004015694 B4 [0003]
• DE 4418460 C2 [0009]

Claims (7)

Composite mat for lining concrete walls comprising a textile layer ( 1 ) with loops ( 2 ) of synthetic material, the loops ( 2 ) from a first surface of the textile layer ( 1 protrude) and being on the second surface of the textile layer ( 1 ) a synthetic protective film ( 3 ) is fastened with a closed surface, characterized in that between the textile layer ( 1 ) and the protective film ( 3 ) a foam layer ( 4 ) is arranged from synthetic material. Composite mat according to claim 1, characterized in that the foam layer ( 4 ) with the surface of the textile layer ( 1 ) is glued over the entire surface. Composite mat according to claim 1 or 2, characterized in that the foam layer ( 4 ) with a surface of the protective film ( 3 ) is glued over the entire surface. Composite mat according to claim 3, characterized in that the with the foam layer ( 4 ) bonded surface of the protective film ( 3 ) is treated such that its wettability with adhesive is increased. Composite mat according to claim 4, characterized in that the foam layer ( 4 ) bonded surface of the protective film ( 3 ) is treated with a corona treatment. Composite mat according to one of the preceding claims, characterized in that the loops ( 2 ) are formed from monofilament plastic yarn which enters the textile layer ( 1 ) is incorporated. Composite mat according to one of the preceding claims, characterized in that it comprises at least one of the following features: 1 ) consists of a ribbon fabric; The textile layer ( 1 ) is made of polypropylene; The foam layer ( 4 ) is made of polyurethane; The foam layer ( 4 ) is with the textile layer ( 1 ) and / or with the protective film ( 3 ) is glued with a polyurethane adhesive; • the protective film ( 3 ) is made of polypropylene or polyethylene.

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