WO1991002296A1

WO1991002296A1 - Process for transferring pictorial or graphical patterns

Info

Publication number: WO1991002296A1
Application number: PCT/EP1990/001205
Authority: WO
Inventors: Hans-Joachim Taschner
Original assignee: Taschner Hans Joachim
Priority date: 1989-07-27
Filing date: 1990-07-20
Publication date: 1991-02-21
Also published as: DE3924848C1; JPH05501162A; EP0484355A1; FI920267A0

Abstract

Illustrations can be produced on supports of various materials, such as metal, wood, glass, plastics, textiles, stone, leather, cork and rubber, using an image-transfer process in which a fixed dry toner image is made on an intermediate document by an electrostatic thermocopying process. The intermediate document consists of a paper preferably coated with stearates to which the dry toner image adheres loosely and from which it can be transferred to and fixed on the support by heat treatment either directly or with the aid of adhesive films or hot-melt adhesive films. In order to produce a coloured image, the dry toner image on the intermediate document is first transferred to an impress film which in turn is transferred to the support by heat treatment at temperatures between 60 and 160 °C.

Description

Process for the transmission of image and / or type samples

The invention relates to a method according to the preamble of claim 1.

Such a method is known from SU-1 350 045 A and is used for the manufacture of thermal decalcifying products which are rubbed onto heated objects at temperatures of 60 ° C. to 80 ° C. or pressed onto them. It is intended to apply the dry toner image to paper, plastic, fabrics and ceramics. This known method has disadvantages, namely that the dry toner image fixed on the heated object very often does not have sufficient color coverage.

Furthermore, a transmission method is known from DE-OS 37 33 385, in which an intermediate template is also produced using an electrostatic thermal copying method. This intermediate template is coated on the dry toner image side with an industrial adhesive, with which the image template is then glued to the surface of the carrier. After a setting time, the intermediate template is peeled off and the transferred image is fixed with a clear varnish. In this case too, a solvent is used for the transfer and fixing, which is contained in the industrial adhesive as a plasticizer.

Finally, DE-AS 28 47 702 discloses a thermal transfer printing process in which sublimation ink on a paper can be transferred to textile fabrics or plastic-treated surfaces under pattern formation, in which the back of the sublimation ink is also provided with a mounting adhesive. From this paper provided with the sublimation ink and the mounting adhesive, the patterns to be transferred are cut out or punched out in mirror image and mounted on an auxiliary carrier, with which the patterns to be transferred are then deposited on the surface of the carrier to be printed and undergo heat treatment for transfer and fixation.

By using a sublimation ink instead of the dry toner, it is possible to improve the quality of the printed patterns, but you have to accept that? the patterns to be transferred must be cut out or punched out in mirror image and assembled on an auxiliary carrier. It is also considered a disadvantage that the substrates to be printed should consist of at least 60% plastic.

The invention has for its object to overcome the aforementioned disadvantages and a method for printing substrates made of different materials, such as. B. glass, metal, magnetic foils, wood, plastics and textiles, which makes it extremely easy and inexpensive to print on surfaces with little time and makes rich color coverage possible.

A solution to this problem for the method mentioned at the outset is characterized by the method steps of claim 1.

If soft carriers are used to fix them, it is provided that the image of the original is transferred to the surface with the aid of a hot-melt adhesive film. Textiles are preferably used as soft carriers. However, carriers made of leather, synthetic leather, neoprene, rubber, foam, plastic film and cork are also suitable for this.

A further embodiment of the invention provides that the dry toner image transferred from the intermediate template directly onto the back of a transparent support by heat treatment and fixed on it is intensified and / or covered by subsequent application of stamping foils with renewed heat treatment.

The color of the toner can be intensified or changed by subsequently applying an embossing film with renewed heat treatment, since the embossing film shines through the toner. The embossed stamped after the heat treatment The film cannot be removed from the toner, since it only forms a firm connection with this and not with the carrier.

A simplified transfer of the original template to a carrier provides that the dry toner image is removed from the intermediate template with the adhesive side of a transparent adhesive film and that the adhesive film is glued to the surface of the carrier, as a result of which the adhesive film left on the carrier offers mechanical protection .

It is also envisaged that the original template is first copied onto a transparent film in a known manner and that the transparent film is copied the wrong way round onto an intermediate template made of paper coated with a release agent. Then the image of the original template is applied and fixed by transfer and fixing in the manner already mentioned on the surface of the carrier.

When printing on transparent substrates, the dry toner image can also be lifted off with the adhesive side of a transparent adhesive film and can be transferred to the back of the transparent substrate and fixed to it.

In order to change or intensify the color of the image, it is also provided that the dry toner image fixed on the carrier is coated with an embossing foil and is lifted off the embossing foil after a further heat treatment, the image assuming the color of the embossing foil.

The transfer of an original image to textiles is possible in a simplified manner in that the dry toner image is transferred directly to the textiles and that a water vapor fixation is used for fixation, at least for textiles. The images become cook-proof at temperatures above 175 ° C.

Finally, a negative print of the original image can be created by transferring the embossing foil provided with the dry toner image to a polyethylene foil at temperatures above 3.20 ° C., so that the entire color of the embossing foil, including the toner, on the polyethylene foil after the carrier sheet has been lifted off adheres, and that with the adhesive side of an adhesive film the image of the original image is lifted in the color of the embossing film in order to produce a negative print of the original image on the polyethylene film or an image left out of the colored surface of the embossing film. The invention with its advantages and features also results from the following description of exemplary embodiments in conjunction with the claims and the drawing. Show it:

Fig.l an intermediate template with a dry toner image produced on electrostatic thermal copying;

2 shows the transfer of the dry toner image onto an embossing film and further onto the surface of a carrier;

3 shows the transfer of the dry toner image to a hot-melt adhesive film and further the transfer to a textile carrier;

4 shows the transfer of the dry toner image from an intermediate template to the back of a transparent support;

5 shows the transfer of the dry toner image from the intermediate template to a transparent adhesive film and the transfer and fixing to the back of a transparent carrier.

In Fig.l is a side view of an intermediate template 10 is shown, which is provided from a sheet of paper 11 with a double coating 12 of chrome stearate. Furthermore, on this intermediate original 10 there is a dry toner image 14 which has been applied and fixed in a conventional electrostatic thermal copying process.

To transfer the dry toner image 14, the intermediate template 10 is placed with the image side onto an embossing film 16, which in turn lies on a carrier sheet 17. By applying heat, the intermediate toner image is transferred to the embossing film according to FIG. 2a. The embossing film provided with the intermediate toner image is now placed on the surface of a carrier 18 according to FIG. 2b and fixed by heat. A temperature between 80 ° C and 120 ° C is preferably used. The specified temperature values are suitable for the toners currently available. If toners become available whose processing temperatures are lower, they can be used in the same way. Due to the greater affinity between the embossing film and the toner heat-fixed on the carrier, those that are not covered with toner can be covered Lift off parts of the embossing film so that there is an image on the carrier 18 which corresponds to the dry toner image, but has a surface corresponding to the color of the embossing film due to the use of the embossing film. This makes it very easy to make any color impression. Since the fixed dry toner image attached to the template 10 is true to the page, the carrier 18 according to FIG.

3 shows the transfer of a correct and fixed dry toner image from an intermediate template 10 to a textile carrier 22. For this purpose, according to FIG. 3a, the dry toner image 14 is transferred to an adhesive film 20 under the influence of heat. Such hot-melt adhesive films, like the previously mentioned stamping films, are generally known and commercially available. The usual working temperature is around 120 ° C.

3b, the hot-melt adhesive film 20 with the dry toner image 14 is placed on the carrier 22 and heat is applied again in order to transfer and fix the dry toner film to the textile carrier 22, in order to heat both the dry toner image 14 and the adhesive adhesive film 20 in to fix the textile fabric. Both the toner 14 and the adhesive adhesive film 20 penetrate into the tissue, as can be seen from FIG. 3c. Since temperatures between 140 ° C. and 180 ° C. may be necessary during the transfer to the fabric, the use of a protective paper on the back of the adhesive adhesive film is expedient. This protective paper is peeled off after transfer to the fabric. Like textiles, other soft materials such as leather, synthetic leather, neoprene, rubber, foams and plastic films or cork and others are treated in the same way.

The application of an image or writing pattern on a transparent, hard carrier is explained with reference to FIG. 4. The intermediate template 10 shown in FIG. 4 a with a correct and fixed dry toner image 14 is placed on the back of the transparent carrier 24 and the dry toner image 14 is fixed on the carrier by the action of heat, see FIG. 4 c. After the paper sheet of the intermediate template 10 has been removed, the printing is finished and can be read from the front in the correct direction, see FIG. 4c.

If the dry toner image is to be applied correctly on the front surface of a hard carrier, it is necessary to apply an inverted dry toner image to the intermediate template. This can be done in a known manner by copying the original template onto a transparent film and then copying it to the intermediate template 10. Then the transfer and fixing takes place on the front of the carrier plate, as described with reference to FIG. 4.

A simplified method for applying an image or writing pattern to a transparent carrier results from the procedure described in FIG. 5.

For this purpose, a reverse image of the original is also attached to an intermediate template 10 as a dry toner image and, according to FIG. 5b, this is lifted off the intermediate template with the aid of an adhesive film 26. This adhesive film 26, together with the dry toner image adhering to it, is glued to the back of the transparent carrier 24 and is therefore legally readable from the front.

A transfer method, not shown in the drawing, is based on an intermediate template provided with the dry toner image and transfers the dry toner image directly to textiles. The heat treatment takes the form of a steam fixation, using temperatures above 175 ° C. This creates a boil-proof image.

The measures of the invention make it possible to print on a wide variety of materials in a very simple and very fast manner while avoiding higher costs, no environmentally harmful solvents or the like being required. The special paper used for the intermediate template is relatively easy and inexpensive to produce and is of particular advantage since the dry toner adheres only very weakly to the special paper and is therefore easy to transfer. When transferred under the influence of heat, the dry toner is fixed on the carrier. If the transfer is done with transparent adhesive films, such as. B. Scotch tape, the images are weatherproof as well as acid and alkali resistant due to the covering with the adhesive film. When the dry toner image is fixed with the aid of hot-melt adhesive films, the image of the original documents on textiles becomes resistant to cooking and cleaning. Not only can electrostatic thermal copying processes be used to produce the intermediate template according to the invention, but also laser printouts on the special paper used for the intermediate template. When using such laser printers, the template can be generated directly on the screen. The invention is particularly economical and can be used universally even for short runs, especially if only a very few prints are required. Nevertheless, the inscriptions or illustrations produced with it are frost, loan and weather-resistant and, if they are attached to the top of carriers, only need protection against mechanical damage that is already provided with hot-melt adhesive films and adhesive films.

By using embossing foils, the color intensities can be intensified and in particular any color tones can be produced in accordance with the large selection of colored embossing foils.

To make an image as a negative print, i. H. the image is surrounded by a colored area of an embossing film, the embossing film provided with the dry toner image is first applied to a polyethylene film at temperatures of approximately 120 ° C. After the carrier sheet has been lifted off from the stamping film, this and the toner adhere to the polyethylene film. Then with an adhesive film, the. Adhesive layer is placed on the embossing film adhering to the polyethylene film, and the image of the original is lifted off in the color of the embossing film. Since the toner stands out slightly from the polyethylene film, but the embossing film adheres firmly in all other areas, the desired negative image is created.

Claims

0 patent claims

1. A method for transferring image and / or typeface patterns from an original to the surface of supports made of different materials, whereby a fixed dry toner image is generated by means of an electrostatic thermal copying process on an intermediate template coated with a release agent, and that with the dry toner image provided intermediate template with the image side placed on the surface of the carrier and again subjected to a heat treatment with at least 60 C to 80 C for transferring and fixing the dry toner image on the carrier, characterized in that the intermediate template provided with the dry toner image on the image side Embossing foil or a Sehmelzklebe film is placed and heated to transfer temperatures of up to 130 C to transfer the dry toner image, and that the embossing foil or Sehmelz adhesive foil provided with the dry toner image before further heat treatment with the image side a on the surface of the carrier.

2. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that the image transferred from the original template for mechanical protection with a stamping foil and applied to the surface of hard carriers is coated with a protective lacquer.

3. The method according to claim 1 or 2, characterized in that the image of the original template is transferred to the surface of soft carriers with the help of Sehmelzklekleilie. - 0 -

4. The method of claim 3, - d a d u r c h g e k e n n z e i c h n e t that textiles, cork, leather, neoprene, rubber, foams and synthetic foils are used as the soft carrier.

5. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that the transferred from the intermediate template directly to the back of a transparent carrier by heat treatment and fixed on this dry toner image by subsequent application of embossing foils with renewed heat treatment is intensified and / or covered.

6. The method of claim 1, d a d u r c h _g e k e n n z e i c h.n e t that the dry toner image is removed from the intermediate template with the adhesive side of a transparent adhesive film, and that the adhesive film is glued to the surface of the carrier.

7. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that the transferred to the surface of a hard support and fixed image of the original for mechanical protection is coated with a protective varnish.

8. The method according to claims 1 and 5, so that the dry toner image fixed on the carrier is coated with an embossing foil and is lifted from the embossing foil after a further heat treatment, the image assuming the color of the embossing foil.

9. The method according to claim 1, characterized in that de provided with the dry toner embossing foil is transferred to a Poly¬ ethylene foil with temperatures above 120 C, so that the entire color of the embossing foil including the Toner adheres fully, - A

and that with the adhesive side of an adhesive film, the image of the original image is lifted off in the color of the embossing film in order to produce a negative print of the original image on the polyethylene film or an image left out of the colored surface of the embossing film.