CS250108B1 - Sandwich film with retractable peeling layer - Google Patents

Abstract

A material with a retractable peelable layer for manual and automated creation of reproduction substrates, the essence of which is that a functional layer is applied to a transparent or translucent foil, consisting of a polymer binder into which pigments, dyes and fillers are dispersed, in which the adhesion to the substrate is controlled by the composition. A light-sensitive, preferably diazographic layer is applied to this layer. The material is intended for use in the entire field of reproduction technology, especially in polygraphy and cartography.

Description

SUMMARY OF THE INVENTION The present invention relates to sandwich films having a retractable peel layer for manual and automated production of reproductive substrates.

These materials are used in the field of printing, cartography, electrical engineering, textile industry and generally wherever background materials are created for further reproduction.

The present peel-off film must be coated with a template light-sensitive layer, for example based on chromium salts, with subsequent washing or coloring of the image shapes or reliefs. This process is time-consuming and, when using chromium salts, is harmful to health and requires additional treatment of the materials before their application. The presently used process places considerable demands on wastewater treatment.

We have now found a sandwich foil with a retractable peeling layer for manual and automated production of reproductive substrates that does not have the above drawbacks. SUMMARY OF THE INVENTION The present invention provides a retractable peel-off sandwich film for forming reproductive substrates by cutting and peeling consisting of a transparent or translucent backing, preferably a polyethylene terephthalate biaxially oriented film having a transparency of at least 65%, and peeling and light-sensitive layers wherein the substrate peel layer in the dry matter comprises 45 to 95 wt. % of polymeric binders, preferably cellulose esters and ethers, or polymers and copolymers of vinyl chloride, vinylidene chloride and vinyl acetate, 0.1 to 45 wt. 0.1 to 18 wt. 0.05 to 12 wt. dyes according to the desired optical density and color shade, preferably aniline dyes, and is applied to the backing sheet at a thickness of 25 to 60 microns and that the diazographic layer is anchored to the surface of the dry peel layer by dispersing binders, preferably copolymers vinyl acetate and ethyl acrylate, vinyl acetate and % of butyl acrylate or vinyl chloride and vinyl acetate; 0.5 to 48 wt. % stabilizing acids, 3 to 42 wt. % neutral or basic stabilizers, 0.8 to 41 wt. % of diazo compounds alone or in mixtures and 0.8 to 47 wt. color-forming coupling components.

The polymeric binder peel layer is nitrocellulose with a high polymerization degree corresponding to 700-1,500 values and the true plasticizer of the layer is dibutyl phthalate, the false plasticizer castor oil.

The stabilizing acids of the diazographic layer are citric, boric, tartaric, oxalic, itaconic acids either alone or in mixtures and the neutral diazographic layer stabilizers are urea and its derivatives and caffeine alone or in mixtures.

The diazo compounds are derived from p-phenylenediamine, preferably 4-diazo-N-alkyl or 4-diazo-N, N-dialkyl-, or 4-diazo-N-alkoxy-p-phenylenediamine alone or in admixture, or the corresponding diazo compounds with heterocyclic radical, preferably morpholine, piperidine and pyrrolidine.

For the blue tone, single or substituted amines of hydroxycarboxylic acids are preferably used, in particular morpholinopropylamide, diethanolumid, piperidide or piperazide of acids or components derived from hydroxy or polyliydroxynaphthalene or the corresponding sulfonic acids or their salts, in particular 2-hydroxy-3-aminoethyl. - naftoové.

For the black tone, the blue coupling components are supplemented with yellow components whose kinetic coupling reaction is close to the kinetics of the blue components, preferably the acetylacetylated derivatives of aniline, benzamide, toluidine, anisidine or polyhydroxyphenols and their substituted derivatives or ethylenediamine-bis-acetoacetamide.

Derivatives of alpha or beta resolcylic acid, preferably methyl or ethanolamide of 3,5-resolcylic acid or 4-bromo-3,15-resolcylic acid, are used for the red drawing.

The present invention also relates to a retractable peel-off sandwich film comprising a transparent or translucent backing, an adhesive layer of polyvinyl ether / polyvinylmethyl, -ethyl, -butyl ether / or polyisobutylene type polymer adhesives, a peel layer and a diazographic layer of the aforementioned types (types) ).

Example 1 A low adhesion peeling layer is applied to a 0.1 millimeter polyethylene terephthalate support:

chlorinated polyvinyl chloride with a high polymerization degree 8.8 g acetone 33.8 g cyclohexanone 35.2 g versatile scarlet 0.2 g

After dispersion, a dispersion of 40 microns in dry weight is applied to the substrate in the usual manner.

A light-sensitive diazographic set consisting of:

water deionized or distilled 750 ml citric acid 29 g

N-morpholinopropylamide acid

2-oxy-3-naphthoic acid 10 g thiourea 28 g urea 14 g aluminum sulphate 9 g zinc chloride 6 g

4-Diazo-2,5-diethoxyphenylmorpholine

1/2 ZnCl2 12 g diethylene glycol 22 g

The substances gradually dissolve and make up to 1000 ml with distilled or deionized water. 75 ml of an aqueous dispersion of vinyl acetate-ethyl acrylate 3: 1 copolymers is added. It is applied as usual and dried.

After the original has been copied by contact or optical transfer and developed in an ammonia vapor or liquid developer, a working auxiliary blue image is obtained for subsequent manual processing by cutting and peeling the negative images or masks.

Example 2 material for creating a reproductive substrate of masks of surfaces, shape fillers and the like:

A dispersion having the composition: 0,1 mili- nitrocellulose, (eg E 950) 12,5 g ethyl acetate 24,2 g butyl acetate 4.2 g acetone 37.4 g castor oil blown 1.7 g dibutyl phthalate 5,2 g verzálový šarlat 1.1 g nitrocellulose 4% 6.8 g

Dry layer thickness 50 microns. The talc is rubbed into the semi-dry layer to achieve better adhesion of the diazcsest. A diazographic light-sensitive assembly comprising:

water deionized or distilled 250 ml tartaric acid 16 g caffeine 4 g aminoethylamide acid

2-hydroxy-3-naphthoic acid 4 g sodium salt

2,7-dihydroxy-3 _; 6-disulfone 2 g acetoacetanilide 1 g

1,3-dihydroxyphenylurea 0,5 g zinc chloride 4 g aluminum sulphate 4 g thiourea 14 g urea 14 g

4-diazo-2,5-diethoxyphenylmorpholine,

1/2 ZnCl2 10 g

After successive dissolution of the chemicals, make up to 300 ml with distilled or deionized water and add 50 ml of a 50% aqueous dispersion of vinyl acetate-butyl acrylate copolymers (9: 1).

After drying and exposure of the original, a black color image is induced by alkali treatment. The reproduction original is then cut and peeled.

Example 3

Apply a 20% solution of polyisobutylene in a 0.03 mm thick polyester backing.

Luenu in a thickness of about 5 micrometers, carries a lacquer with the following composition: on which polyvinylmethyl ether 2 g polyvinylbutylether 14,5 g butyl acetate 7 g acetone 65 g Castor oil 3,5 g dibutyl phthalate 7,5 g malachite green 0.2 g chrysoidin R 0.3 g

Deposition of dry matter with a thickness of 45 microns. A light-sensitive diazographic assembly according to Example 2 is applied to this dry layer and dried. After copying the original and developing it in an alkaline environment, the material can be further drawn and used for further reproduction.

Claims (10)

A sandwich film having a retractable peel layer for forming reproductive substrates by cutting and peeling consisting of a transparent or translucent backing, preferably a polyethylene terephthalate biaxially oriented film having a transparency of at least 65% and peeling and light-sensitive layers applied thereto, the peel layer in the dry matter comprises 45 to 95 percent by weight of polymeric binders, preferably cellulose esters and ethers or polymers and copolymers of vinyl chloride, vinylidene chloride and vinyl acetate, 0.1 to 45 percent by weight of true plasticizers, 0.05 to 12 wt. dyes according to the desired optical density and color shade, preferably new dyes of the invention, and is applied to the backing sheet at a thickness of 25 to 60 microns and that the diazographic layer is anchored on the surface of the dry peel layer by dispersive binders, preferably copolymers vinyl acetate and ethyl acrylate; % and butyl acrylate or vinyl chloride and vinyl acetate; % of these binders, 0.1 to 48 wt. % stabilizing acids, 3 to 42 wt. % neutral or basic stabilizers, 0.8 to 41 wt. % of diazo compounds alone or in mixtures and 0.8 to 47 wt. color-forming coupling components. 2. The composite film of claim 1, wherein the polymeric binder layer is nitrocellulose having a high polymerization degree corresponding to K values of 700-1,500. 3. A sandwich film according to claim 1, wherein the true layer softener is dibutyl phthalate, the false plasticizer castor oil. 4. Sandwich film according to claim 1, characterized in that the stabilizing acids of the diazographic layer are citric, boric, tartaric, oxalic, itaconic acids either alone or in mixtures. Sandwich film according to claim 1, characterized in that the neutral stabilizers of the diazographic layer are urea and its derivatives, optionally caffeine alone or in mixtures. 6. Sandwich sheet according to claim 1, characterized in that the diazo compounds are diazo compounds derived from p-phenylenediamine, preferably 4-diazo-N-alkyl- or 4-diazo-Ν, Ν-dialkyl- or 4-diazo. -N-alkyl-N-alkoxy-p-phenylenediamine alone or in admixture, or the corresponding diazo compound with a heterocyclic radical, preferably morpholine, piperidine and pyrrolidine. Sandwich film according to claim 1, characterized in that single or substituted hydroxycarboxylic acid amines, in particular morpholinopropylamide, diethanolamide, piperidide or piperazide of acids or components derived from hydroxy- or polyhydroxy-naphthalene or corresponding sulfonic acids are preferably used for the blue tone or salts thereof, especially 2-hydroxy-3-naphthoic acid aminoethyl. 8. Sandwich film according to claim 1, characterized in that for the black tone the blue coupling components are supplemented with yellow components whose kinetics of the coupling reaction are close to that of the blue components, preferably acetylacetylated derivatives of aniline, benzamide, toluidine, anisidine or polyhydroxyphenols. substituted derivatives or substances of the ethylenediamine-bis-acetoacetamide type. 9. A sandwich film according to claim 1, characterized in that: The method according to claim 1, characterized in that the derivatives of alpha or beta resolcylic acid, preferably methyl or ethanolamide of 3,5-resolcylic acid or 4-bromo-3,5-resolcylic acid, are used for red drawing. 10. A sandwich film according to claim 1, characterized in that it consists of a transparent or transhicent backing, an adhesive layer consisting of polymeric adhesives of the polyvinyl ether / polyvinylmethyl, -ethyl, -butyl ether or polyisobutylene type, the peel layer and the diazographic layer.