DD205202A1 - METHOD FOR THE PRODUCTION OF SELF-ADHESIVE FLUIDED FLAKE TILES - Google Patents

Abstract

The invention relates to self-adhesive flocked surfaces with a wide range of applications, for example in industry, in the home sector and as decoration material. The aim and the object of the invention is to make it possible to produce self-adhesive flocked sheets with the required tensile strength, noise and dust-absorbing properties and a decorative surface in a rational process. For this purpose, a pressure-sensitive adhesive consisting of a mixture of aqueous polyacrylate is applied to a film or release paper and applied to this pressure-sensitive adhesive layer after a thermal treatment, another adhesive and flocked with flock fibers. The flock fibers are fixed in a further thermal treatment and, if necessary, on the raw white, monochrome or melange-colored Flockfaserflor another surface design, such as printing, praegen made.

Description

Title of the invention;

Process for the production of self-adhesive flocked fabrics

Field of application of the invention :

Self-adhesive flocked fabrics have a wide range of applications. They can be used, for example, as decorative material for dressing a wide variety of surfaces or in the technical sector as a sound or dust-absorbing material.

In addition, to utilize the adhesive properties of the pile, various loading panels, rolls or the like may be adhered to the flocked material.

Characteristic of the known technical solution ;

According to known methods, the self-adhesive effect causing pressure-sensitive adhesive layer is prepared separately and then laminated by pressure and optionally heat to the sheet to be coated. Thus, according to DD-PS 111 691, the pressure-sensitive adhesive is first applied to an abhesive intermediate carrier (siliconized paper). This is applied to the back of the fabric ·

10, JUH. 1982 * 015 400

240602 2

The disadvantage of this method is that for the production of a self-adhesive flocked sheet, the pressure-sensitive adhesive layer and the adhesive layer for receiving the flock fibers must be prepared separately in two technological stages.

In addition, a high cost for the preparation of the pressure-sensitive adhesive is necessary, in which to achieve the desired surface tack different resins must be introduced.

Aim of the invention ;

The object of the invention is to produce by a new process self-adhesive flocked fabrics with little economic effort.

Explanation of the essence of the invention ;

The invention has the object, a self-adhesive sheet whose surface is flocked and decorative and which has the required tear resistance, sound and / or dust-absorbing properties to produce in a rational process.

The object is achieved in that applied to a sheet, in particular film of high polymers such as polyolefins, polyester or release paper, a polyacrylate adhesive in a thickness of 0.05 to 0.9 mm, coagulated and then another on this adhesive , preferably PVC adhesive, in a thickness of 0.05 to 1.0 mm is applied. By flocking flock fibers, preferably made of polyamides, a length of 0.5 to 15 mm are introduced into the adhesive and fixed by thermal treatment at 100 to 200 ⁰ C with a residence time of 10 - 20 min.

240602 2

As a pressure-sensitive adhesive, a mixture of aqueous polyacrylate is used which coagulates at 50 to 180 ⁰ C with a residence time of 2-20 min but not cured.

Surprisingly, it has been found that applied to these so prepared pressure sensitive adhesive in a technological process of the adhesive for fixing the flock fibers, the flocking with short fibers and the thermal and other post-treatment can be done while the required properties of the product can be achieved efficiently.

The film, which served as a base for the coating and flocking, takes over the function of the protective layer for the pressure-sensitive adhesive in the product. If required, it can be removed without residue and the exposed pressure-sensitive adhesive layer allows the fast adhering of the flocked material to a suitable surface. The best adhesion is achieved on smooth, non-porous surfaces (metal, glass, Sprelacart, painted surfaces, etc.). The pressure-sensitive adhesive used in the invention contains only Polyakrylatdispersionen, tackifying resins need not be dispersed to increase the surface adhesion behavior.

The product does not contain anti-adhesive papers coated with silicone preparations.

The flock fibers used are preferably dyed and consist of polyamide, polyacrylonitrile, polyester, polyolefin, viscose or cotton fibers or mixtures thereof. The flock fiber length and the titer range 0.05 to 150 tex are varied depending on the purpose of use.

240602 2

After the flock fibers have been fixed in the adhesive, the excess flock fibers are removed. If required, a further surface design, for example by printing, embossing, calendering, is carried out on the raw white, monochrome or melamine-colored flock fiber pile made by flocking fiber blends of different colors.

The invention requires that the production takes place continuously in succession in a technological process. If this is not the case for technological reasons, in a separate manufacturing process after the application of the pressure-sensitive adhesive and its coagulation interim release paper is applied, which is removed before continuing the process of the invention.

The invention will be explained on exemplary embodiments.

Embodiment 1 ;

On a film, a pressure-sensitive adhesive consisting of a mixture of aqueous polyacrylate dispersions in a thickness of 0.4 mm is knife-coated and then thermally treated at 80 ⁰ C and a residence time of 5 min in a hot air continuous dryer.

On the pressure-sensitive adhesive layer, the application of a PVC adhesive in a thickness of 0.5 mm, in which by means of electrostatic flocking brown colored flock fibers made of polyamide with a length of 3 mm and a titer of 22 dtex are introduced. The final thermal treatment of the entire material in the hot air flow dryer is carried out at 150 ⁰ C with a residence time of 10 min.

 - 5 -

240602 2

This gives a sheet, which can be preferably adhered to smooth surfaces after removal of the film as a sound and dust-absorbing material.

Explanatory note 2;

Preparation according to embodiment 1, wherein the coagulated pressure-sensitive adhesive layer is covered in the meantime with a siliconized non-stick paperboard, which is removed before continuing the process according to the invention.

Embodiment 3 ;

Preparation according to embodiment 1, wherein light brown flock fibers with a length of 2 mm and a titer of 3.3 dtex are used.

The product can be used as decoration material after two-color printing by means of rotary screen printing machines.

Embodiment 4 ;

Preparation according to embodiment 1, wherein green-colored flock fibers with a length of 2 mm and a titer of 2.2 dtex are used.

The pile side is given a cord embossing prior to curing of the adhesive to fix the flock fibers, thereby increasing the decorative value of the material.

Claims (8)

240 6 02 Invention claim; 1. A process for the production of self-adhesive flocked fabrics using a sheet, for example a film of high polymers, a PVC adhesive and flock fibers, characterized in that on a sheet, in particular film of high polymers, such as polyolefins, polyesters, or release paper, a pressure-sensitive adhesive Polyacrylatbasis applied in a thickness of 0.05 to 0.9 mm, coagulated and then applied to this then another adhesive, preferably PVC adhesive, in a thickness of 0.05 to 1.0 mm, in the by means of known flocking flock fibers , preferably made of polyamides, a length of 0.5 to 15 mm and fixed by known thermal treatment in the adhesive and the product is post-treated. 2.40 602 2 2. The method according to item 1, characterized in that the production is carried out continuously in succession or in separate manufacturing process after the application of the pressure-sensitive adhesive and its coagulation zwischanzeitlich release paper is applied. 3. The method according to item 1 and 2, characterized in that the pressure-sensitive adhesive consists of a mixture of aqueous polyacrylate and not fully cured. 4. The method according to item 1 to 3, characterized in that the pressure-sensitive adhesive for coagulation of a thermal treatment at 50 to 180 ⁰ C with e: from 2 to 20 min. is subjected. Treatment at 50 to 180 ⁰ C with a residence time 5. The method according to item 1, characterized in that flock fibers are used in a titer range of 0.05 to 150 tex used. 6. The method according to item 1 and 5, characterized in that the flock fibers are preferably colored. 7. The method according to item 1 to 6, characterized in that the applied Flockfaserflor is preferably aftertreated by printing and / or embossing. 8. The method according to item 1 to 7, characterized in that the film of high polymers or the release paper on which (s) the pressure-sensitive adhesive and the adhesive are applied with the flock fibers fixed therein, is withdrawn residue-free in the application.