DK142881B - Adhesive textile wallpaper consisting of a textile web, a plastic layer and an adhesive layer. - Google Patents

Description

142881

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive textile wallpaper consisting of a textile web, a middle layer of plastic adhesive adhering throughout the back thereof, and an adhesive layer adhering to this plastic layer.

Such textile wallpapers, where the back of the textile web is provided with a layer of synthetic material on which a self-adhesive coating is deposited, is known from the description of DE usage pattern no.

1904026. The layer of synthetic material must adhere to the textile web and be elastic, which is why a foam layer is preferably used to compensate for any irregularities in the surface of the substrate.

However, such adhesive coating wallpapers have the disadvantage that a protective paper is required, which complicates the fabrication and complicates the intended use of the product, since there is considerable risk of dimensional changes which can lead to the pattern shifting in two neighboring webs during setup.

15 Wallpaper with a self-adhesive layer also has the disadvantage that after the set-up can no longer be shifted to compensate for minor inaccuracies. The description of DE usage pattern no. 1,904,026 does not indicate that instead of a self-adhesive coating, a e.g. from United States Patent No. 3,275,469 known adhesives which can be made adhesive by wetting.

The adhesive fabric loss of the present invention is characterized in that the textile web is hydrophobic, that the resin layer consists of non-water-soluble homopolymers of vinyl compounds or non-water-soluble acrylic resin copolymers having a thickness of 25 some µ to some tenths of mm and the adhesive layer is dry and, as an adhesive, contains a water-reactivable adhesive.

This results in the fact that the fabric wallpaper is easier to use than the known self-adhesive fabric wallpaper, since it does not require protective paper, and since, after setting up with water activation, it is possible to make adjustment for a certain period of time without the risk of dimensional change.

In the fabric in question, the fabric layer is so thin that the textile web will continue to be soft and pliable.

The water reactivable adhesive is preferably aging resistant and insensitive to moisture, heat and cold.

The textile web may consist of a natural or synthetic material which may be woven or knitted or specially made of fiber felt.

The material may be bleached, printed or colored.

2 142381

The adhesive fabric wallpaper of the invention can be made by making a textile web hydrophobic, e.g. by treatment with zirconium salts, fluorine-containing resins or pyridine derivatives, optionally with the addition of a dimension stabilizing agent, after which, in one operation, preferably by peeling or spraying, pi-05 a dispersion of the adhesive non-water-soluble resin is applied. so as to form a smooth, water - impervious film with a coherent surface that adheres to the textile web. Finally, on the surface of this film, preferably by spraying or rolling, an adhesive layer compatible with the film material is applied which adheres well to both the film and the intended substrate, such as a wall, whereby the amount of adhesive is so adjusted. that the wallpaper can adhere to both rough and smooth surfaces. Preferably, the wallpaper is dried between each treatment step.

The invention will now be described in more detail in connection with the drawing.

On the back of a hydrophobic textile web 1 there is a resin layer 2 which makes the web impermeable to water and stabilizes it, ie. makes it undeformable and prevents the fibers from moving. An adhesive layer 3 is applied to the resin layer which contains a water-reactivable adhesive. This must be insensitive to atmospheric moisture, so that the finished wallpaper can be stored without protective paper.

The textile web is made hydrophobic by immersing it in a bath containing zirconium salts, e.g. in a wax emulsion with 25 zirconium salts, or in a bath which, in addition to zirconium salts, also contains titanium alcoholate. However, the textile web can also be made hydrophobic with fluorinated resins or pyridine derivatives.

Furthermore, as stabilizers, compatible resins based on melamine urea, urea -30 formaldehyde, melamine-formaldehyde or other polymerizable or non-polymerizable substances may be added with the other ingredients. Depending on the products used for impregnation, a hydrophobic textile web is obtained which can either be washed or suctioned.

The emulsion used to produce the water-impermeable resin-35 layer may be an aqueous emulsion or an emulsion in a solvent.

Various aqueous resin types can be used in aqueous emulsion, e.g. polyvinyl or polyvinylidene chloride which are polymerizable and self-branching or already polymerized in emulsion. The plastic used must be insensitive to water. The emulsion formation can be performed mechanically or by means of an emulsifier. A suitable thickener may be added which, after drying, is insensitive to water. The solids quantity must be so large that a molding film is formed in a single pass on the roller. The viscosity of the emulsion depends on the material used and should be adjusted so that the film is formed on the surface and does not penetrate the fabric at the passage of the roll. It is also necessary to avoid the presence of metal salts which may interfere with the subsequent reactivation of the adhesive.

When a solvent resin emulsion is used, acrylic resins or polyvinyl chlorides are suitably used. After applying the emulsion, the solvent can be recovered. The thickness of the film depends on the film-forming ability of the resin and is between some µ and some tenths of mm.

The water activatable adhesive, which must not detach from the resin layer, may be a resin emulsion, e.g. a polyvinyl acetate emulsion which is insensitive to water. Furthermore, as adhesives, proteins, starch, starch flour, dextrins, caseins, rubber, polyvinyl alcohol and acetate, as well as isocyanates can be used.

The viscosity of the adhesive is adjusted according to the method of application, e.g.

25, so that the desired thickness of the adhesive layer is achieved in a single operation. For this purpose, the dry matter content of the adhesive should be of the order of approx. 40%. The water used to reactivate the adhesive must not react with the water-impermeable resin film.

The preparation of a fabric wallpaper according to the invention is illustrated in more detail in the following examples.

Example 1 1. A piece of bleached cotton fabric of fairly solid structure and printed or colored, was impregnated by dressing with a commercially available emulsion of wax and zirconium salts. The bath concentration was determined by a test experiment. To the bath, urea-forma 4 H2S-S1 lining resin and a corresponding catalyst were added to make the fabric dimensionally stable and water repellent. The substance was dried and passed through a polymerization chamber and then rolled up.

2. On the back of the water-repellent, an amount of 2 05 100-150 g / cm 2 was applied to a mechanically produced dispersion of a cationic acrylic resin which, after drying, forms a film which is insensitive to water, benzene or petroleum ether. slightly sensitive to chlorine-containing solvents and insensitive to acetone. The dispersion was applied by means of a roller, so that a regular and error-free plastic layer of a thickness of a few µ was formed.

The coated fabric was dried and rolled up.

3. For reactivation with water, an adhesive based on an emulsion of polyvinyl acetate thickened with a solution of dextrin added with carboxymethyl cellulose was used to obtain the necessary consistency for application by means of a roller. This neutral solution was protected with an antifungal agent such as laurylpenta-chiorphenol.

The adhesive was purged in one working step on the plastic-coated dried fabric, after which the fabric passed through a drying tunnel.

20 The finished product could easily be set up on a substrate after activation with water, and it was possible to adjust without dimension change for a certain period of time.

Example 2 The first step, namely the treatment for obtaining hydrophobic properties and stabilization of the substance, was repeated as in Example 1 by the preparation of a product "275" on the basis of pyridine compounds, with the bath concentration at the setting being 130 g / ml. liters of product "275" and 20 g per liter of accelerator. This avoided the 30 polymerization step and afforded a substance which could be easily wiped and washed as it is insensitive to water.

The subsequent treatment was as in Example 1, and the finished substance had similar properties.