JPH06270593A - Production of transfer printing paper and device therefor - Google Patents

Abstract

PURPOSE: To provide a method and an apparatus for preparing a transfer paper for baking a picture pattern, letters and a decorative pattern on an ceramic object to be sintered such as tablewares and tiles or an object stable at high temp. CONSTITUTION: A ceramic pigment is compounded in a water-soluble org. soln. contg. a burning suppressing additive and the compd. is transferred on a transfer paper 10 by means of an integlio printing method using a printing plate with a hollow depth of at least 80-100 μm and the pigment is homogeneously distributed in the added soln. before it is received on an integlio press cylinder 1. For practicing this method in use, a little change in an integlio printing machine is required. I.e., a homogenizer 6 for distributing homogeneously the pigment in the water soln. is arranged in a color storing container 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a transfer printing paper with a picture, a letter or a decorative pattern on the pigment side of an object and bake or heat it with this pigment to produce tableware,
Illustration for baking ceramic objects such as tiles, or objects that are stable even at high heating temperatures such as beer bottles,
TECHNICAL FIELD The present invention relates to a method for manufacturing a transfer printing paper for printing characters and decorative patterns, and an apparatus for carrying out the method.

[0002]

2. Description of the Related Art Ceramic pigments which are fundamentally different from ordinary pigments used in other printing methods are used for the above-mentioned types of ceramic material images or decorative equipment. Because, it is necessary to burn this ceramic pigment with the formed ceramic slag. To that extent, ceramic pigments are not applied directly to the object, apart from the individual direct color application by hand or brush, which, as is well known, has never been possible for special work areas. The so-called transfer paper, which is produced only by offset printing or silk-screen printing, is used to at least approximately identify the individual prints to each other. This transfer paper represents a kind of "transfer image" which is fixed in a suitable manner to the object to be decorated. However, this "transfer image" is not "bleeding out" in the usual sense, but the holding paper easily burns at fairly high temperatures (800-1,200 ° C), in which case it also burns the pigment.

However, in offset printing of such transfer printing papers, rather than directly printing with the kneaded pigments to do so, first a tacky varnish is printed and then this varnish is applied by a powder machine or Disperse with a colored pigment. In that case, the ceramic pigment is adhered to the printed varnish and the non-adhered pigment is removed. This method requires up to 24 processes for each individual color, depending on the decorative design, as each color can be applied primarily. This means very long manufacturing times, very high costs and, above all, inaccuracies that today's demands are unacceptable, but still have to accept. It is necessary to make the necessary reordering of the ceramics, for example cracking, as the images resulting from other fabrication processes and sometimes quite different from the original, are different.

Similarly, in the second method for producing transfer printing paper, namely silk screen printing, which has been put into practical use only for this special working range, the transfer paper is placed on a screen printing device. The screen is pressed against the sheet and then a paste-like color is pressed by a doctor through the screen, i.e. its plain image part, and applied to the transfer paper. This application is so inaccurate that often results in 60% loss, again requiring color to be reapplied to the color. In that case, the manufacturing time is longer and the silk screen printing method is all inaccurate. This is because the screen can control mechanical parts and color schemes according to individual treatments and thus without standardization. These difficulties are practically the same as those of the offset printing method, and these conventional and practical methods are significantly deviated from the production methods that can be carried out according to the DIN standard. However, in spite of the large demand for the number of parts, it has been necessary and accepted until now.
The reason is that no other method can be used.

[0005]

The object of the present invention is to produce transfer printing paper, and for this special field, a large number of printing processes also use varnishing and powder coating, and long It is an object of the present invention to provide a method for achieving the optimum baking result of a pictorial design or a decorative design on a ceramic material, which can be standardized without requiring a drying time, and an apparatus for executing this method.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the above-mentioned object is to attach a transfer printing paper having a pattern of illustrations, characters or decorations on the pigment side of an object and bake or heat it together with this pigment. However, it is a method for producing a transfer printing paper for printing illustrations, characters and decorative patterns on objects to be baked such as tableware and tiles, ceramic objects to be baked, or objects that are stable even at high heating temperatures such as beer bottles. The ceramic pigment is dissolved in a water-soluble organic solution containing a combustion-suppressing additive, and the ceramic pigment is transferred to a transfer printing paper by using a printing plate having a recess depth of at least 80 to 100 μ by an intaglio printing method. It is solved by making a uniform distribution in the additive solution before receiving.

Further, according to the present invention, the above-mentioned problem is solved by the present invention. An intaglio printing cylinder 1 equipped with a pattern printing plate having a doctor 2, an attached pressing cylinder 3 and a color transfer cylinder 5 directly or indirectly intaglio printing. Cylinder 1
An apparatus for carrying out the method according to claim 1, comprising a color storage container (4) for transferring to a color storage container (4) and a supply member (3) for guiding a printed matter between an intaglio printing cylinder (1) and a pressing cylinder (3), wherein the color storage container (4) is water-soluble. A homogenizer 6 for maintaining a uniform distribution of the pigment in the organic solution is provided, the depressions 11 of the pattern printing plate 13 have a depression depth of 80 to 100 μ, and the maximum cross section Q of each depression 11 is printed by the pattern printing plate 13. It is solved by being located on the side face 12.

Further advantageous configurations according to the invention are described in the dependent claims.

[0009]

In this case, it is necessary to include an additive that suppresses combustion, so that the pigment is uniformly distributed, and it is necessary to maintain the uniform distribution during the printing process. This is important, but the precondition is given that an intaglio printing known per se can be used, which is also capable of printing the three primary colors and possibly also black and gold in a manner well known for this purpose. Only for the point that it is necessary to install a homogenizer in the color container for a commercially available intaglio printing machine (whether it is a sheet feeding printing machine or an intaglio printing rotary machine that operates continuously). Changes need to be made. This homogenizer is intended to ensure that the pigment in the solution is evenly distributed during printing and reaches the depressions of the pressing cylinder in a uniform distribution, which is either directly immersed in the solution or The color is constantly supplied via a transfer cylinder that immerses the part in the solution. In order to explain that a fairly accurate and rational intaglio printing method has not yet been used for the above purposes, the heavy ceramic pigment decomposes, so that this pigment can be processed into a raw paste and processed. It can only be assumed that the intaglio printing method does not pose a problem. In addition, there are causes of interference and suppression of thought.
In other words, from a viewpoint that cannot be easily thought of, on the one hand, the ceramic color is more easily adapted to intaglio printing, so there is a liquid consistency of the ceramic color that is usually required for intaglio printing, and on the other hand, it is mainly free regardless of the burning process. In order to achieve various designs or decorative patterns, there is a stronger color application required compared to the usual colors processed in intaglio printing.

DE 24 08 899 and DE 28 28 320 have already disclosed the application of the intaglio printing method for producing transfer printing paper. In DE 24 08 899, a disperse color material made exclusively in the usual way and having a viscosity characteristic which is undesirable for intaglio printing is given the liquidity necessary for intaglio printing,
It relates to forming and processing the dispersed color material so that this property is retained over time. In contrast, German Patent 28 28 320 relates to an intaglio printing machine for printing on transfer paper, but not on the transfer printing paper itself, but on the back side of this transfer paper with a so-called separating layer. This separating layer acts as a diffusion barrier for the printed colour, in which case it has nothing to do with it.

The solution of the present invention is not limited to the instruction to simply transfer the ceramic pigment to the transfer paper for each intaglio printing, but the combination requires the major additional treatment of the present invention, that is, the addition which inhibits combustion. Use of materials, abnormal depth of dents, and uniformity of color additives well-prepared to a liquid consistency suitable for intaglio printing when transferring ceramic colors to conventional technology It is necessary to maintain a solution additive of the present invention, that is, a solution additive consisting of the following as a pigment retention material for an organic aqueous solution: a) ethoxypropanol b) ethanol c) Diethyl hexceptate d) Nitrocellulose e) Ethyl acetate and f) Polyethylene wax dispersions are very suitable, per 1000 a) 80-120 b) 490-5 20 c) 50-70 d) 190-210 e) 90-110 f) 25-45.

Surprisingly, the use of heavy ceramic pigments, which are easy to separate in intaglio printing, ensures reliable printing on the transfer paper and thus on ceramic objects with designs and decorations. The same combustion results can be obtained with. In this case, the ceramic pigment used has a particle size of <5 μ and is uniformly distributed in the solution additive at 40-65% by weight during the printing process. With respect to the amount of pigment added to the solution, it is important that all solvent and pigment additives that can be treated are sufficiently water-soluble and capable of intaglio printing. The range of weight% specified depends, for example, on the decoration of hard or soft porcelain and on which color of pigment to handle.

In summary, what is important overall is that for the applicability of the intaglio printing method known per se, the pigment must be present in the solution at a fairly high content, in the form of a mesh screen. The depth of the depression must be fairly deep (normally 30 μ, here at least 80-100 μ) and that in addition to this the solvent additive must contain a fairly high content of flame retardant additive. is there.

Solvent is of particular importance with regard to "burn-up" additives in the solvent. This is because preliminary tests showed that solvent additives were mostly found in the absence or only small amounts of these additives (wax additives are known to be suitable for this). It has been shown to burn something explosively with the pigment and therefore be lost for color application.

It is a particular problem to be involved in the additional purpose determination of objects which are stable in shape even at high heating temperatures, in particular transfer paper for beer bottles. Label the beer bottle as is well known. After returning the bottle, the label needs to be removed with a chemical treatment (acid bath). In that case,
Overall, there is a large amount of label residue associated with the treatment agent, and these label residues are necessary in terms of environmental pollution of waste treatment, which until now could not be fully solved. Become. As regards the cost-effective manufacture of transfer papers possible with the solution according to the invention, as indicated, instead of the conventional labeling, beer bottles can also be designed in this way with patterns, letters and decorations as well. You can This only needs to be done once. Because,
This is because the burning of the pigment can be maintained at least as long as the average life of the beer bottle. As is known, the work to date of replacing the labeling with other possibilities has been related to this in that fine line codes (bars), such as the color coating method which seems to be the first suitable in this context, are common these days. I'm frustrated just because I can't make the code together.

As explained, the above-mentioned device or the intaglio printing machine requires only slight modifications which can be easily set up in order to carry out this method.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments schematically shown in the drawings. An apparatus or an intaglio printing machine for carrying out this method comprises an intaglio printing cylinder 1 having a doctor 2, an associated pressing cylinder 3 and a collar on a forming cylinder 1 directly or indirectly by a transmission cylinder 5 (see FIG. 2). It is composed of the pigment storage container 4 to be transmitted and a supply member for supplying the printing material between the molding cylinder 1 and the pressing cylinder 3.

The ceramics pigment in an aqueous organic solution was transferred to the transfer paper 10, 10 'by intaglio printing for each printing.
Since the pigment can be uniformly distributed and held in the solution additive before being relayed to the intaglio molding cylinder 1, the color storage container 4
In FIG. 1, a homogenizer 6 for maintaining a uniform distribution of the pigment in an aqueous organic solution is arranged as shown in FIG. In this homogenizer, for example, two rapidly operating screw agitators 6 ′ project into the storage container 4. Alternatively or additionally, it is possible to provide the storage container with a circulation pump 8 in the circulation circuit 7 as shown. In this case, it is advantageous if the circulation pump 8 is arranged in the return connection 11 in the upper part of the storage container, which makes an alternating current. Although not shown, the storage container 4 has the necessary color introduction conduits and overflow sections to maintain the immersion level of the intaglio printing cylinder 1. The same applies substantially for the arc intaglio printing machine of FIG. 2 used especially for thin coatings. That is, the storage container 4 there is also equipped with the homogenizer 6 as described above. However, for the sake of completeness, it is understood that when the transfer printing paper is color printed three or four times, it is necessary to continuously arrange an appropriate number of printing members or printing systems as shown in FIGS.

It is not possible for the user of this method to freely set the composition that matches the correct components of the color additive to be printed, and to that extent, in order to establish a proper standard, the solvent and the ceramic pigment or the precipitate should be separated. Although you can expect
It is advantageous to put all the additives, consisting of solvent and pigment, in a transport and storage container and to use for further finishing. In that case, of course, good mixing is advisable before pouring into the storage container 4. The application of the finish-printed transfer printing paper to the object to be decorated and to be burned can be easily performed by humidification and pressing before further burning.

Regarding the formation of the depression in the shape of the intaglio, please refer to FIG. 3 and FIG. The shape of the intaglio plate is composed of a cylindrical or flat printing plate 13 which is distributed in a pattern on the surface 12 on the printing surface side and is provided with depressions 11 containing a printing color. Only a small part of such a printing plate 13 is shown. That is, it is shown by the depression 11 in the cross section (shown in a considerably enlarged manner).

In this case, the important thing is that according to FIG.
The depressions 11 have a depth T of at least 80 to 100 μ, and the maximum cross section Q of all the depressions 11 is the surface 1 on the printing side of the printing plate 13.
It is located at 2. Such a depression 11 not only has the otherwise normal depth T in the intaglio, but the peripheral region R of the depression 11 is completely open outwards, unlike the comparative drawing of FIG. 4 (ordinary intaglio depression). It is characterized by This means that the printing color in the depressions is completely transferred when printing on the transfer paper. Ignoring that the conventional intaglio depression of FIG. 4 has a rather shallow depth, this depression has an undercut portion 14 (here hatched). Thus, in this case, the largest cross section is not at the printing surface 12 but rather well below it.

With conventional intaglio printing plates, that is to say with shallow depths and "undercut" depressions, printing results on transfer paper are not impaired. But,
In this case, it should be noted that the color application of the individual pattern points is too weak as a whole, at which time the area around the pattern points is very small, and the color application is received. This only results in a pale pattern reproduction after burning the color pigments.

However, as can be seen, such optimal pattern reproduction is achieved when using both procedures in combination when making intaglio printing plates. That is,
The fact that the depressions are not undercut under the perimeter R of their perimeter results in an extreme depression depth and depression 11 configuration that is unusual for conventional intaglio printing practices. This configuration is not associated with unusually deep depressions, although it is known that the depressions 11 do not cut in the back or bottom.

When the new intaglio printing plate 13 is used, not only a sufficiently thick pigment is applied to the transfer paper, but also unlike ordinary offset or silk screen printing, it is applied with high reproducibility of reproduction of the figure. Can be done. This is also especially important in ensuring that the readable code is transferred, for example to a glass bottle. This is not possible using conventional offset printing or silk screen printing methods for making transfer paper. Milk bottles, beer bottles, yogurt bottles, lemonade bottles, soft drink bottles, etc. Uses a suitable paper label that can be printed without problems. However, it is very important to replace such labeling with the possible direct printing via transfer paper made by intaglio printing. That is, it is important not only to reduce the costs associated with this, but also to eliminate the need to dispose of labels that have come off the return flange, and these labels, as a whole, have a significant amount of weight. become.

[0025]

As explained above, for the production of transfer printing papers by the method and the device according to the invention, and for this special field, numerous printing processes also use varnishing or powder coating. In addition, it does not require a long drying time, and can be standardized for execution, so that it is possible to optimize the picture design or decorative design on the ceramic material and always obtain the same baking result.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a color design system that operates continuously, but prints colors on a rotary intaglio printing machine not shown otherwise.

FIG. 2 is a sectional view showing the principle of an arch type printing machine.

FIG. 3 is a cross-sectional view of an intaglio printing plate with a single hollow.

FIG. 4 is a corresponding cross-sectional view of a conventional intaglio depression.

[Explanation of symbols]

 1 Intaglio Cylinder 2 Doctor 3 Pressing Cylinder 4 Color Storage Container 5 Transfer Cylinder 6 Homogenizer 6'Screw Stirrer 7 Circulation Circuit 8 Circulation Pump 10, 10 'Transfer Printing Paper 11 Cavity 12 Flange 13 Printing Plate; Intaglio Printing Plate 14 Undercut

Claims (7)

[Claims] 1. An object for baking ceramics, such as tableware and tiles, by sticking a transfer printing paper on which an illustration, a character or a decorative pattern is attached, on the pigment side of the object, and baking or heating together with this pigment. Object, or a method for producing a transfer printing paper for printing a pattern of characters and decorations on a stable object such as a beer bottle at a high heating temperature, a ceramic pigment is added to a water-soluble organic solution containing a combustion suppressing additive. Melt and at least 80 ~ 100μ by intaglio printing method
A method of transferring the ceramic pigment to a transfer printing paper using a printing plate having an indentation depth of 1 to obtain a uniform distribution in an addition solution before being received in an intaglio printing cylinder. 2. An additive consisting of a) ethoxypropanol b) ethanol c) deethylhexaphthalate d) nitrocellulose e) ethyl acetate and f) polyethylene wax dispersion is used for the water-soluble organic solution. Claim 1 characterized by the above.
The method described in. 3. The dissolved components in the solution have the following concentrations with 1000 as a denominator: a) 80-120 b) 490-520 c) 50-70 d) 190-210 e) 90-110 f) 25- 45. The method of claim 2, wherein the method is 45. 4. The method according to claim 2, wherein the pigment having a particle size of <10 μ, preferably <5 μ is added to the aqueous solution in an amount of 40 to 65% by weight. 5. An intaglio printing cylinder (1) equipped with a pattern printing plate having a doctor (2), an attached pressing cylinder (3), and a color transfer cylinder (5) directly or indirectly. An apparatus for carrying out the method of claim 1, comprising a color storage container (4) for transferring to (1) and a supply member for guiding the printed matter between the intaglio printing cylinder (1) and the pressing cylinder (3), The color storage container (4) is provided with a homogenizer (6) for maintaining a uniform distribution of the pigment in the water-soluble organic solution, and the recess (11) of the pattern printing plate (13) has a recess depth of 80 to 100 μ. An apparatus characterized in that the maximum cross section (Q) of each depression (11) is arranged on the printing side surface (12) of the pattern printing plate (13). 6. A ceramic pigment additive for carrying out the method of claim 1, wherein the ceramic pigment is stored in a transport / storage container together with the solvent additive of qualitative and quantitative composition according to claims 2-4. Additives of ceramic pigments characterized by being present. 7. Use of a transfer paper printed with a ceramic pigment according to any one of claims 1 to 4.