DE1940532C - - Google Patents

Description

In known methods for reproducing graphic originals one has the output sheet, the one normally solid, vaporizable image-forming substance in intimate contact with a receiving surface heated in such a way that the image-forming substance is converted into vapor form and transferred to the receiving surface, and the steam then condenses. Depending on the working method, hieroei can be reversed or Right-sided reproductions received (cf. German Auslegeschrift 1 249 891). If the playback is not correct, especially in the one-step process, however, there is often a pale, less color-intensive print and, moreover, a very uneven distribution of the dye, especially in the case of larger areas. Through this the overall picture appears blurred.

In order to remedy this disadvantage, one has with waxes or certain polymers and optionally Papers coated with fillers developed (German Auslegeschrift 1 207 408), whose ao coated sides directly with the one with the image-generating one Substance-provided surface of the original can be brought into contact, so only one deliver a reversed image.

However, about sharp statements of the wrong one Obtaining an image of the original in a simpler way is done according to the Swiss patent specification 435 332 known method produces a paper with a printing ink layer made of sublimable Substances in a binder with a softening point above the transition temperature as well as, if necessary, of plasticizers or substances loosening the layer bandage, and brings it into contact with a piece of paper to be written on. After the labeling, you separate the both papers, with the inscription reversed on the reverse side of the inscribed paper is. and then makes reproductions of the original font in accordance with the usual thermal printing process here.

Even if the printing ink layer is applied to the carrier film in a desired pattern would, however, with the help of these sublimation printing forms, only single colors, i.e. monochrome or with side by side. Colored pictures or line drawings, transferred by means of heat will. They are unsuitable for multicolor transfer in the sense of a color print because no true-to-original prints of multicolor printing forms can be obtained. When the ink transfer is made under the action of heat with printing forms, which one in layers on have the form of a printed pattern made up of yellow, red and blue inks, the last printed one will be Transferring the top layer of blue ink without being disturbed by the action of heat. the The middle layer of the red printing ink becomes the upper when it is transferred through the binder film Layer of the blue ink interrupted, and the transfer of the yellow dye the bottom Layer is interrupted by the two overlying binder films of the blue and red printing ink. It will therefore be multicolored instead of a. True to the original impression either only the blue one Transfer of dye, or a completely differently colored image is obtained from the printing form.

The object of the invention was to create a sublimation printing form for multicolor transfer of printing inks on various surfaces under the action of heat, in the case of the deficiency that in the application of the known sublimation printing forms to multicolor transfer occur, be avoided. This object is achieved by the invention.

The invention thus provides a sublimation printing form for producing multicolored prints in one operation from a carrier film printed with binder-containing sublimable printing inks for the transfer of printing ink under the action of heat, with the characteristic that it contains sublimable printing inks which are imagewise different, distributed in a dry, solid resinous binder and arranged in layers one on top of the other, the binder either an insoluble in the binder or DruckfaTbenlösungsmittel wherein f_) be ^r tragungstemperatur inert, non-softening or meltable porous granular inorganic or organic Fu, cloth! and / or at the transfer temperature under Ga. developmental decomposing material, whereby said ink layers also become porous when heated and permeable to the sublimable printing inks.

Due to the porosity of each printing ink layer printed on the printing form when the dye is transferred the gaseous, sublimated dyes can also penetrate the lower layers and transferred to the area to which the dyes are to be transferred. The becoming porous The layers are achieved in two ways, individually or in combination. After the one way will uses an ink binder that contains an inactive filler in the form of fine grains, which is insoluble in the solvent and the dissolved part of the binder and due to the action of heat neither softens nor melts during transfer. The other way is a binder is used, which contains a substance that forms vapors or gases when heated, causing the layer becomes porous before the dye sublimes. The gases must be inert to the dyes.

According to a preferred embodiment of the invention, the upper layer contains the sublimation printing form larger amounts of the filler and / or of the substance which decomposes with evolution of gas and / or a dye is used in the lower layer whose sublimation ability is greater than that of Dyes in the upper layers.

In general, multi-color prints are given their hue by a combination with compliance of shades of the three basic colors yellow, red and blue, which are printed in this order even if it does not necessarily have to be restricted to this order. The ink layers from the yellow, red and blue printing dyes are each with the usual photographic Process-made printing plates for offset printing, gravure printing, embossing or screen printing imprinted.

According to the invention, multicolored layers from the three printing inks are usually applied to the Sublimation printing form printed on in the usual way. The following detailed explanation of the invention relates to such three-color printing forms. However, more colors can also be used in the same way applied to the sublimation printing forms and transferred by the action of heat.

In the production of the multi-substances according to the invention, such as synthetic resins, of which warm color printing forms the printing inks i.i three hardening resins are preferred, natural resins such as Layers in the order yellow, red and blue on regenerated rubber, and natural substances such as wood Carrier material, e.g. B. Printed paper. The coal powder and cellulose powder. The grain size Printing ink of each layer consists of a dye 5 of the filler must be according to the desired purity and one of the filler or gas evolving agent of the ink impression can be selected. Bezum Binders containing porosification. Grain sizes below 5 μm are usually preferred it is preferred to mix the knife.

The inert filler is preferably in a Make binder so that the amount of filler io amount of 50 to 150 parts by weight per 100 parts by weight or the amount of gas-evolving substance used in the binder. When the binder The top layer is the largest and / or for which contains too large amounts of filler, the bond strength The lowest layers sin dye is selected, that of the printing ink areas too weak, while with too The porous areas sublime more easily than the dye of the later small amounts of filler printed inks. For example, there will first be 15 of each other, so that the subliming color is one yellow printing ink on a film, such as paper, does not produce a passage from the lower layers printed, which finds more of a sublimable yellow color.

substance and a binder with A percent by weight The transition of the color layers consists of the mechanical filling material or gas-evolving substance, which makes the binder porous when heated on the recipient by dye-sublimation printing. 20 area onto which the dye is to be transferred. Then a red printing ink is promoted over the yellow one by printing the filler content of the printing ink, the sublimable binder of each printing ink layer being differently red dye and a binder with a weight of B - is, whereby the amount of filler in the upper layer is percent of the same filler ο the gas-evolving material than in the lower layer sublimable blue dye and one and blue, if the printing of the sublimation binder, which contains C percent by weight of the same filling printing form with multi-colored layers in the series fabric or gas-wrapping fabric, is carried out using yellow, red and blue,
red ink layer printed. The concentration of the filler makes the printing ink layer porous, so that fillers or substances that release gas are selected from the subliming dye in such a way that A <B <C . There will be a multi-penetration. The porosity of the von c'er color sublimation paper drurV ^ orm according to a base area of the transfer paper most widely obtained management form of the invention. removed layer must be larger than that of the other

Another embodiment of a multi-color layer, so that color from the lower layers

Sublimation paper printing form can be sublimated by printing 35 fabric. The amount of filler in

a yellow printing ink on paper that consists of each layer is therefore adjusted to be in the

strongly sublimable yellow dye and a layer facing away from the carrier material the largest

Containing filler or gas-generating substance.

Binder consists, overprinting the yellow layer The explained as an example of a paper printing form

with a red printing ink from a moderately sublimated 40 sublimation printing form according to the invention

red dye and the same binder with the image surface on the receiver surface.

and finally overprinting this layer with a brought and heated under pressure, e.g. B. with an elec-

blue printing ink from a slowly sublimable tric iron, the heat of which on a certain

blue dye and the same binder. The ones in every shift

placed. 45 imprinted dyes sublime, and the sub-

Suitable dyes for mat according to the invention penetrate the overlying porous layers

reversible printing inks are z. B. basic triphenylenes and is deposited with condensation on the

methane dyes, disperse dyes, stain dye receptor surface evenly. This will make that

substances, azo-anthraquinone-triphenylmethane dyes transfer the same color image that the paper printing form

and oxidation dyes. The chemical constitution 50 carries. You can do the broadcast a few tens of times

the dyes are not particularly limited as long as they make, though the transferred image is gradual

they are sublimable dyes. it gets worse.

Binders that can be used include carb- Wenn instead of a filler, a gas-evolving one

oxymethyl cellulose, alginic acid and its derivatives substance used and the sublimation printing

and homopolymers or copolymers based on 55 orm printed ink layer by

Heat made porous by vinyl alcohol, vinyl acetate, vinyl chloride, acrylic can be used as gas-evolving

acid, methacrylic acid and / or maleic acid. Stiff z. B. the following connections are used:

Inert fillers that are present in the azo compounds according to the invention, such as A / odicarbonamide, A / obisiso-

Sublimation printing forms used are butyronitril, Azocyclühexylniiril, Dia / uumimihcnznl

simple inorganic compounds and compounds 60 and barimnazodicarboxylate, sulfonyl hydrazides, such as

fertilize one or more silicon, barium, benzenesulfonyihydrazide, benzenesulfonylhydrazide, I'olu-

Calcium, potassium, magnesium, zinc, iron, alu- olsulfonylhydrazide and diphenylsulfone-3,3 * -disulfo-

minium, tin, lead, cadmium, sulfur and / or nylhydrazide, nitroso compounds, such as N.N-Dinitm-

Contain carbon atoms, such as sulfates, especially so-penlamelhylenetetramine and N, N-dimethyl-N, N'-di-

Barium and calcium sulfate, carbonates, such as calcium nitrosoterephthalic acid, or inorganic compounds

and magnesium carbonate, silicates, such as aluminum fertilizers, such as sodium bicarbonate, sodium carbonate,

and magnesium silicate, sulfides such as zinc sulfide, oxides, ammonium bicarbonate and ammonium nitrite,

such as aluminum and silicon oxides, and organic If such a gas-evolving substance ium

Compensation of the heat transfer of each dye in the layers when printing the pattern is used in the order yellow, red and blue and the amount of substance in the binder of the printing ink is A, B or C percent by weight, then A <B <C , where A , B and C preferably make up 2 to 30 percent by weight based on the resin content of the binder.

The sublimation printing form, which is assembled in this way, is brought with the image surface on a receiving surface and heated under pressure, e.g. B. with an electric iron with a set temperature. In this case, the gas-generating foaming agent releases gas and the relevant printing ink layer is made porous. Almost at the same time, the dyes sublime and migrate through the porous printing ink layers onto the receiver surface. In this case, the amount of gas evolving material in the top layer is greater than in the lower layers, whereby the porosity de ^r upper layer is greater than is the lower layers, and the transmission speed of the sublimated dye in the upper layer is about equal to that in the lower layers will. Practically the same coloring and symmetry of the printing form are transferred to the receiving surface. If dyes with different sublimation properties are used in each printing ink layer of the sublimation printing form, the dye can be selected so that the dye in the lower layers sublimates more quickly than the dye in the upper layer, which further harmonizes the dye transfer.

The invention is illustrated in more detail by the following examples.

example 1

It is a gravure paper by means of gravure plates with three printing inks tier the following composition printed in the order yellow, red and blue:

a) Yellow printing ink parts by weight

Water soluble acrylic resin 8

Water 92

Silicon dioxide (mean particle size 1

up to 2 μ) 5

Diacelliton Eohtgelb G 15

b) Red printing ink parts by weight

Water soluble acrylic resin 8

Water 92

Silica 7

Kayalon real ruby B 15 _{5 y}

c) Blue printing ink parts by weight

Water soluble acrylic resin 8

Water 92

Silica 9

Sumikalon blue f'B 15

Ils becomes a multi-colored sublimation printing form from paper. I) the paper comes with a clean white PolyuMcrsloff brought into close contact and 30 seconds; u-f IKO C crhil / .l. Hs becomes a Polycslcrslofl with your flck-hcn multicolored Mtislcr, like it the dttickform / οίμΐ.

Example 2

A gravure paper is printed with gravure printing plates with three printing inks containing azodicarbonamide with a particle size of less than 0.04 mm, which ^{decomposes with evolution of gas at 190 to 200 0} C, in the order yellow, red and blue:

a) Yellow printing ink parts by weight

Water soluble acrylic resin 7

Water 93

Azodicarbonamide (foaming agent) .... 0.7

(10%) Diacelliton real yellow G 15

b) Red printing ink parts by weight

Water soluble acrylic resin 7

Water 93

Azodicarbonamide (foaming agent) 1.05

(15%) Kayalon real ruby B 15

c) Blue printing ink parts by weight

Water soluble acrylic resin 7

Water 93

Azodicarbonamide (foaming agent) 1.4

(20%) Sumikalon Blue FB 15

A multicolored sublimation printing form is obtained, which is printed on a clean white polyester fabric brought and heated to 195 ° C for 60 seconds. It will be the same multicolored on the polyester fabric Pattern as received on the printing form.

Example 3

A sublimation printing form is produced from paper according to Example 2, but with the following Printing inks are used:

a) Yellow printing ink parts by weight

Water soluble acrylic resin 8

Water 92

Dinitrosopentamethylenetetramine

(Foaming agent) 1.6

Diacelliton real yellow G 10

b) Red printing ink weight parts

Water soluble acrylic resin 8

Water 92

Dinitrosopentamethylenetetramine

(Foaming agent) 1.6

Kayalon real ruby B 12.5

c) Blue printing ink parts by weight

Water soluble acrylic resin 8

Water 92

Dinitrosopcntamethylenetclramine

(Foaming agent) 1.6

Sumikalon blue FB 15

In Example 2, a polyclinic is colored and get the same result.

Claims (1)

Example 4 slowest. The one with the printing inks in the ge named order of printed transfer paper A printing paper is placed over a receiving material with the following intaglio printing and is printed under colors: Print ^{heated to 180 °} C. for 60 seconds. It will be 5 identical multicolored patterns as on the printing form a) Yellow printing ink obtained parts by weight. Water soluble acrylic resin 12 Das on the surface of the receiver material Water 98 image obtained with the aid of the invention Silica 10 sublimation printing forms has a p-Aminoacetaniüd 10 io superior coloring compared to known ones Sublimation printing forms keep printing. It who- b) Red printing ink parts by weight _{which, through} heat transfer, produce exactly the same color Water-soluble acrylic resin 12 creates patterns in clear and clean form, like you Water 98 are present on the printing form. Silica 10 ₅ i o _as receiver material may ordinary paper, 2-chloro-4-nitroanüin 10 _e j _n be plastic, fibrous material or a metal. ·> Ni r »ι γ u <-. · I ... μ In addition to multicolor printing, inking can also be c) Blue printing ink Weight stcile ,, ... _c , .. "-. ,. ■ ', .....,.,., print with the relevant printing forms. Wasserloslicb.es acrylic resin 12 are made Water 98 _ao Silicon dioxide 10 claims: 1,4-Dimethylaminoanthraquinone 10, sublimation printing form for making more colored prints in one operation from one It becomes a multicolored paper as a sublimation with binder-containing sublimable printing mation printing form. The measurement of the as-colored printed carrier film for the printing ink sublimation speed of the dye results, transfer under the action of heat, d a d u rc h that p-aminoacetanilide the fastest, 2-chloro ge k e η η ze i c h η e t.d that they image-wise several 4-nitroaniline moderately fast and 1.4-dimethyIamino- different in a dry solid resinous anthraquinone sublimated the slowest. when the binders spread subpurnable inks Contains sublimation printing form over a receiver sheet 30 arranged in layers one above the other, is pressed and heated, the same dye · with the binder either one in the binding pattern as received on the printing form. medium or printing ink solvent insoluble, inert at the transfer temperature, not Example 5 softening or fusible porous granular 35 inorganic or organic filler and / or According to Example 4, a sublimation printing form will undergo one at the transfer temperature printed with the following inks: gas evolution contains decomposing substance, where through the ink layers when heated a) Yellow printing ink parts by weight also porous and for sublimable printing polyvinyl alcohol 20 40 colors become permeable. Water 150 2nd sublimation printing form according to claim 1, da- Soft tone 15 characterized in that the printing ink diacelliton Real yellow G 10 layers one at a time from the carrier film increasing amount of inert filler and / or b) Red printing ink parts by weight _{45 of the decomposing} substance contained in the binder. Polyvinyl alcohol 20 3 sublimation printing form nad * claim 1 Water 150 _oc j _er 2, characterized in that the printing soft clay 15 layers of paint are inert from 50 to 150 parts by weight Cibacet Brilliantrosa 4 BN 12 contains filler per 100 parts by weight of binder. c) Blue printing ink parts by weight ⁵ ° 4 sublimation printing form according to claim 1 '" . , ™ ^{or 2} > characterized in that the pressure Polyvinyl alcohol 2U paint layers 2 to 30 percent by weight of the itself Water, "decomposing substance, based on the binding agent, Soft tone 15 included. Cibacet Brilliantblau 3 RL 15 _{w 5} Sublimation thickness according to one of the following Claims 1 to 4, characterized in that the Of the dyes mentioned, Diacelli sublimates printing ink layers from the carrier film; tone real yellow G fastest, Cibacet brilliant pink dyes with sloping sublimation wedge 4 BN moderate and Cibacet brilliant blue 3 RL am included. 309611/28