DE2224277A1 - Transfer picture masking - by applying acrylate monomers - Google Patents

Abstract

Film foils or lacquer masks are produced on wet-transferable transfer pictures, used for decorating articles e.g. ceramics, glass or enamel, by applying esp. by screen-printing, n- or iso-Bu- or Me methacrylate or other acrylate monomers, which are pref. partly polymerised or contain dissolved poly-Bu- or-Me methacrylate or other polyacrylate, and opt. plasticisers, in order to form solns. of suitable viscosity for application. The pref. partly polymerised monomers may be admixed, before application, with polymerisation catalysts. Polymerisation is pref. completed by electron- or Uv. -radiation.

Description

DlPL-I N G. RU DOLFS. KODRON- PAT E N T A N WALT

65MAINZZRHEIN ₁ ADAM-KARRILLON-STRASSES

May 16, 1972 Ifd ”, No. ₀ 72 244

Patent application

of the companies J ₀ Albrecht, Mainz-Mombach and Po Xaver Lelpold, Zirndorf

Method for producing a film foil (lacquer mask) on any decor pictures

Decorative pictures, also called sliding pictures, are used to decorate any objects and to a large extent for the decoration of ceramic objects, enamel objects

»Stands and glassware used

In the prior art, such decals are in various printing processes, such as <> Bo in lithographic printing, offset printing, screen printing, etc. _e to a suitable transfer paper printed in this transfer paper is it's specialty papers, provided the softenable with a water "glue or plastic stick are ₀

Decorations, font images, drawings, and all kinds of images can be printed in conventional printing processes "One used depending on the application of the finished images suitable fiafür selected printing inks ,, Thus z _e B ₀ normal for the manufacture of decorative images for the decoration of a use or for decoration for advertising purposes the usual offset printing

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colors or screen printing inks used «Should Such pictures are used for ceramic decoration, so it is necessary that ceramic Colors can be printed. The print media then used must also be based on the ceramic To be branded

In this state, however, these printed decorative images are not yet usable, ie _o not transferable. If you were to water such a picture together with its paper support in order to be able to transfer the picture, the decoration would flow apart, especially when it comes to fine drawings or lettering. For this reason, the printed decors are overprinted over their entire surface with a film varnish in screen printing. The film varnish dries to a stable varnish film.

To transfer the decorative images, ie _e for decorating objects, the decor image is watered · The permeable paper carrier lets the water through, so that the dextrin or plastic layer of special paper · softened now, the decorative image that is held together by the mask sheet on the Object to be decorated can be pushed over · After pushing over, a Gunnni roll is used

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or m ± "fc a rubber squeezer that under the decor image squeezed out existing water and pressed the picture smooth. Images transferred in this way adhere on most objects due to the adhesive effect of the glue, dextrin or plastic that was transferred from the backing paper to the object on its underside.

If it is a ceramic decoration, then this amount of adhesive is also sufficient to fix the picture on the ceramic object until the ceramic colors are in the kiln go into a river and the ceramic decoration melts away · In the case of ceramic decorations, the organic print media as well as the film mask burn up Without leaving any residue, so that after the ceramic firing of these media and of the pilmick mask nothing remains.

The film mask remains in the case of non-ceramic decorations on the decor. The decor or the lettering is both through the film mask remaining on it against mechanical stress as well as against weather influences largely protected

According to the state of the art, the mask printing varnishes are plastics that are in solvents are resolved. After printing, the solvents evaporate and the plastics dry into one foil-like mask film. Known to be

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for the production of mask printing varnishes for both ceramic and non-ceramic decorative purposes. Solutions of polybutyl methacrylate, polyisobutyl methacrylate, polymethyl methacrylate and various copolymers, ethyl cellulose, cellulose acetobutyrate, nitrocellulose, polyvinyl chloride, polyvinyl chloride copolymers, etc. The proportion of dissolved polymer used is generally between 20 and 45% by weight of the ready-to-use solution · In many cases, mixtures of polymers are used in order to achieve certain elastic properties. Plasticizers are also added to achieve the same purpose. Depending on the spec. Weight of the plastic contained and the solvent used result in percentages by volume of 15 to 4o ^ o polymeric plastic in the solvent _β

An important criterion for the usefulness of a film mask for the transmission of such slide images on objects is their stability. Only with a sturdy film mask is it possible to create decorative images from Backing paper to be transferred to the objects to be decorated. The layer thickness of the film mask plays a role a very important role in this. Coarse-meshed printing screens are used to achieve greater layer thicknesses and in VM.en cases, the film masks are created by printing the film lacquer twice over one another manufactured · Due to the relatively high proportion

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the dry film thickness of volatile solvents is often quite small Wet film thickness of 30 my, which is generally achieved if you are "a 120 steel mesh for screen printing is used, after the solvents have evaporated and the film mask has dried up Dry film thickness of about 12 my.

The object of the invention is to provide a film varnish to be found that does not contain any volatile solvents and is therefore identical in wet and dry film thickness »

The method according to the invention for producing a film foil (lacquer mask) on any decorative images is characterized by the fact that in the screen printing process · » or with the help of another application process monobutyl methacrylate, monoisobutyl methacrylate, Monomethyl methacrylate or other monomeric acrylates are applied to decorative images «,

To improve the necessary print consistency in the finished film varnish, it is also advisable to that in the listed monomers polybutyl methacrylate, polyisobutyl methacrylate, polymethylraethycrylate or other polyacrylates are dissolved, so that ready-to-use solutions are created using the screen printing process or can be applied to wet-transferable decorative images in another application process.

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To increase a desirable and sufficient Viscosity of the liquid paint mask solution is proposed that the monomers listed so far Partly polymerized are used that they are screen printing or another application process can be applied to wet transferable decor images *

Another advantageous embodiment of the invention The method consists in that prior to application to wet transferable decorative images catalysts be added, which cause the polymerization of the polymerized or monomeric acrylates «

There is also the advantageous possibility of applying the decorative images applied to wet transferring polymerize monomeric or partially polymerized acrylates by means of electron irradiation or UV irradiation.

If the above-mentioned catalyst is added, the irradiation time in the electron gun or in the UV irradiation can be shortened or such post-curing can be dispensed with altogether.The irradiation time is already quite short and is only a few seconds if a wet film hits the electron gun or passes through the UV hardener, which consists of polymers dissolved in monomers «

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It also orders the advantageous possibility that the solutions of monomeric acrylates and polymeric acrylates additions of plasticizing softeners contain"

With the aid of the method described above, lacquer masks can thus be produced, the dry film thickness of which corresponds approximately to that of the wet film thickness ₉ so that two overprinting of the film lacquer is unnecessary.

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Claims (5)

May 16, 1972 serial no.72 2kk Claims / Ί. j Process for producing a film (lacquer mask) on any decorative images, characterized in that monobutyl methacrylate, monoisobutyl methacrylate, monomethyl methacrylate or other monomeric acrylates are applied to decorative images by screen printing or another application process. 2. The method according to claim 1, characterized in that in the listed monomers polybutyl methacrylate, Polyisobutyl methacrylate, polymethyl methacrylate or other polyacrylates are dissolved, so that they are suitable for processing Solutions are created using the screen printing process or another application process be applied to wet transferable decorative images. 3. The method according to claim 1, characterized in that that the listed monomers are used in polymerized form that they can be screen-printed or can be applied to wet-transferable decorative images in another application process. 309848/0673 4. The method according to claims 1 to 3 »characterized in that before application on wet transferable decorative images catalysts are added to the polymerization the polymer-based or monomeric acrylates. 5. The method according to claims 1 to k, characterized in that the applied to wet transferable decorative images monomeric or polymerized acrylates polymerize by means of electron irradiation or UV irradiation. ο Process according to claims 1 to 5 »characterized in that the solutions of monomeric acrylates and polymeric acrylates can contain additives of plasticizing agents which cause plasticizing _e ORIGINAL INSPECTED 309848/06 73-