CS244564B1 - The process of multi-color printing of chlorinated vinyl polymer based materials - Google Patents

Abstract

The invention provides a method for multi-color printing of flat materials based on chlorinated vinyl polymers in such a way that the transfer of the color pattern is realized by applying a color pattern carrier, preferably paper for transfer printing, to the printed plastic material at a temperature of 150 to 220 °C, for 3 to 360 s under a pressure of 10 kPa to 1 MPa. The method according to the invention can be used for printing transparent and opaque foil, sheet or other type of plastic material based on chlorinated vinyl polymers. The color pattern carrier is separated from the printed plastic material cold or hot.

Description

3 244564

BACKGROUND OF THE INVENTION The present invention relates to a process for the multi-color printing of flat materials based on chlorinated vinyl polymers of a transfer color pattern by sublimation or vaporization from a tightly bonded colored pattern carrier, for example for covering floors, for table, decorative, packaging materials, or for other uses.

The current method of printing PVC sheet materials, a particular PVC flooring is characterized by a narrow color scheme, usually non-colored patterns. The color effect is poorly achieved by the indirect indirectly, for example in the case of cloths, by applying a transparent protective layer of PVC to a multi-colored printed, paper or other substrate.

There are, however, a number of patented methods for direct multi-color printing of PVC sheet materials that can be applied by applying color substrates in the form of powders, solutions, or pastes containing spitty types of organic solvents and the like. These methods require relatively demanding machine equipment, as well as ancillary equipment to ensure the safety of work and the working environment directly when suppressed. Their disadvantage is the easy damage to the applied pattern even with low mechanical stress in the normal use of the product.

It is known to print by applying solutions or pastes to a color pattern of a rotary, screen and other printing technique, for example, DOS 2 509 837 and DOS No. 2 606 328, in addition to DOS mechanical or electronic devices. No. 3,002,505 and DOS 2,756,595, optionally by combining a nozzle and shade mask assembly of DOS 2 900 658.

Another principle is based on inventions of the coating of plastic layers, namely, by printing on the screen in the form of integrated geometric or decorative patterns of DOS 2 552 653, or by applying multi-color coatings from combinations of resin powders capable of altering their color due to thermal, ultraviolet, radiation electromagnetic field, stage number 2 452 811.

The principle of the printing of chlorinated vinyl polymer-based materials by transferring a color pattern by sub-extrusion or hot vaporization of a color material carrier according to the invention is to adhere tightly to one side of the printed plastic material. the carrier of the color pattern at a pressure of 10 kPa to 1.0 MPa at a temperature of 150 to 220 ° C for 3 to 360 seconds depending on the thickness and underlay of the printed plastic material and the color pattern carrier is detached from the printed material, wherein in suppressing the transparent film, the carrier of the color pattern is pressed against the rim side, and when the opaque foil, the dock or the foam material is suppressed, the carrier of the color pattern is pressed from the cheek side.

According to the process of the invention, it is possible to produce a multi-color imprint, compared to today's tri-color, to remove the energy-intensive printing process from aqueous solution, from solvents or from melt, and to obtain a print quality with resistance to damage which does not reach them. -the other by other, so far outdated ways.

The method of the invention has emerged from the results of the experiments. In a series of laboratory experiments, impregnated paper with a layer-color image based on neutral dispersion dyes, fixed to the paper by a thermoplastic resin, was applied to the PVC foil. The suppressed folios consisted of 65% by weight of a suspension PVC of K-value of 70 to 35% by weight. dioctyl phthalate builder. The thickness of the film was 0.2 mm. The pattern carrier was pressed on a PVC foil with a pressure of 0.1 MPa using a plate heated to 180 ° C during different times from 3 to 60 s. It was found that 77.7% by weight of the dye from the paper carrier was transferred to the PVC foil. Upon repeated attempts to increase the temperature to 220 ° C and extend the pressure to 100 seconds, up to 96% by weight of the dye was transferred, thereby greatly increasing the color saturation of the pattern.

The transfer system of the converted pigment-based printing, which at temperatures from 150 ° C to 220 ° C, sub-limits to the colored pairs and the instantaneous diffusion to the pressed plastic pre-heated foil, as evidenced by the fact that the transmitted image did not exhibit almost no color abrasion.

The second experiment was transferred directly to the PVC foil made on 25% by weight emulsion PVC by K-value 67 containing 15% by weight dioctylphthalate-based and 60-filler. On the extruded, gelatinized and still hot PVC foil at a temperature of about 180 ° C, a paper carrier of the color pattern was pressed, which was heated from the back by the irradiator to a temperature of 145 ° C. on a PVC substrate with a pressure of 10 to 20 kPa by means of a roller for 20 seconds. After this time and release of the overpressure, the paper carrier was pulled out of the PVC-coated foil and the printing process was quenched. The analysis revealed that this technology succeeded in transferring up to 80% by weight of the weight component of the carrier-colored color pattern of the suppressed PVC substrate by utilizing a significant portion of the heat used by the PVC yarn. In conclusion, the refinement of the temperatures, times and pressures required to optimally dye out the carrier to 244564 5 70-95% w / w was reversed. A temperature range of 150 to 220 ° C was determined at a time of 3 to 360 seconds, mainly according to the crest of the PVC pressure sheet from 10 kPa to 1.0 MPa. The achieved print brilliance of the print, the abrasion resistance of the dye, and the resistance to mechanical stress met the requirements required for PVC utility products such as floorings, table cloths, wall hangings or curtains. Example 1 A PVC composition consisting of 63% by weight suspension PVC (K-value 62), 25% by weight dioctyl phthalate, 10% by weight of chloroparaffin, 1.0% by weight of dibutyltin maleate, 0.5% was prepared. % by weight of stearin and 0.5% by weight of calcium stearate, which is processed on calender on a 0.45 mm thick film at 160 ° C. The folios are covered with a colored paint carrier with the facial face and placed in a hydraulic press heated to 170 ° C and sealed at a temperature of 0.6 MPa for 120 seconds. the press is opened and the color pattern carrier is removed from the selected film while still warm. It can be seen from the visual inspection of such a printed film that the color pattern is transferred from the carrier to the full color saturation. In microscopic examination on the cut, it can be seen that the individual colors diffused to a depth of 0.18 to 0.30 mm, i.e. they penetrated into 40 to 67% of the total ridgefolios. This has made the printing complete resistant to mechanical damage. EXAMPLE 2 A PVC composition having a composition of 72 is prepared. weight suspension PVC (K value 70), 12 weight% dioctyl phthalate, 8 weight% dioctyl adipate, 3.0 weight% acrylate modifier, 2.7 weight% epoxidized soybean oil, 1.5 weight% bu -tylene glycol beta-aminocrotonate, 0.35% calcium stearate, 0.15% zinc stearate and 0.3% glycerol monostearate, to be made at a temperature of 0.15 on a four-cylinder calender at temperatures of 145-180 ° C mm. A pressure of 0.12 MPapper-pattern carrier is then immediately pressed onto the thus-prepared foil leaving the fourth cylinder of the calender with a temperature of 178 ° C at a temperature of 0.12 ° C. , and thereafter thermoplastic with another foil auxiliary device and wound onto a carrier coil of the used carrier. The film thus provided with the suppression of the multicolored pattern is laminated with a white unprinted wallpaper paper of 80 g weight in the laminating apparatus. m-2. This results in a washbasin, equipped with an aesthetically effective, multi-color, resistant to damage. The microscopic cross-sectional inspection showed that the suppressed pattern is contained throughout the film thickness. Example 3 PVC composition consisting of 18% by weight suspension PVC (K-value 68), 10% by weight emulsion PVC (K-value 62), 12% by weight dioctyl phthalate, 4% by weight chloroparaffin, 2.5% % epoxidized soybean oil, 0.8% by weight of castor oil, 0.6% by weight of rapeseed oil, 0.5% by weight of calcium stearate, 0.3% by weight of stearin, 0.2% by weight of hard paraffin ( melting point of 54 ° C), 1.1% by weight of dibutyltin carboxylate and 50% by weight of micro-milled limestone, is calibrated at a temperature of 145-160 ° C on a three-roll kalan-dri at a thickness of 160 cm and a thickness of 1 5 mm, and the carrier of the eight-color pattern is pressed onto the face at 158 DEG C. for a period of 6 seconds with a film speed of 10 m. min-1. The pattern carrier is then hotly separated and the suppressed foil is laminated with a 0.5 mm thick transparent foil, pre-heated with the irradiators to 160 ° C. The flooring produced in this way excels in the fidelity of depicting an eight-color pattern with subtle shades and transitions, unreasonable other repressive techniques. By microscopic observation, the diffusion of colors into the printed and laminated films can be seen.

Claims (3)

SUBJECT 1. A process for printing multicolored sheets based on chlorinated vinyl polymers by transferring a color pattern by sublimation or hot vaporization from a color carrier, characterized in that the side of the printed plastic material is tightly applied to the color carrier at a pressure of 10 kPa to 1.0 MPa , at a temperature of 150 to 220 ° C, for 3 to 360 seconds, depending on the thickness and compliance of the printed plastic sheet material, the carrier of the color BACKGROUND separates the image transfer from the printed material. 2. The method according to claim 1, characterized in that, when the transparent foil is printed, the color pattern carrier is pressed from the reverse side. 3. The multicolour printing method of claim 1, wherein the opaque foil, thatch, or foam material is pressed from the face side when printing an opaque film, thatch, or foam material.