阅读说明：本技术 一种红色印金铝箔纸生产工艺 (Production process of red gold-printed aluminum foil paper ) 是由 王科明 楼依哲 于 2020-07-08 设计创作，主要内容包括：本发明公开了一种红色印金铝箔纸生产工艺,包括如下步骤：1)在带铝箔的PET薄膜附着上热熔胶；2)将亮铜纸则复合在铝箔上；3)过内置加热器的高温辊子压合,得到铝箔纸；4)将压合好的铝箔纸收卷；5)将收卷好的铝箔纸,通过铝箔复合纸凹版印刷机进行印刷,其印刷后的铝箔纸依次经过复合烘箱装置,所述复合烘箱装置包括由隔板分隔而成便于铝箔纸依次通过的第一烘箱、第二烘箱、第三烘箱、第四烘箱。本发明通过采用复合烘箱装置,其采用四个不同干燥温度的烘箱,避免了实际墨层表面温度高于预控制的温度,使得铝箔纸印刷后变色,粘结剂表面结皮。(The invention discloses a production process of red gold-printed aluminum-foil paper, which comprises the following steps: 1) adhering a hot melt adhesive to the PET film with the aluminum foil; 2) compounding the bright copper paper on the aluminum foil; 3) pressing the paper by a high-temperature roller with a built-in heater to obtain aluminum foil paper; 4) rolling the pressed aluminum foil paper; 5) and printing the rolled aluminum foil paper by an aluminum foil composite paper gravure printing machine, wherein the printed aluminum foil paper sequentially passes through a composite oven device, and the composite oven device comprises a first oven, a second oven, a third oven and a fourth oven which are separated by partition plates to facilitate the aluminum foil paper to sequentially pass through. According to the invention, by adopting the composite oven device and four ovens with different drying temperatures, the situation that the actual surface temperature of the ink layer is higher than the pre-controlled temperature is avoided, so that the aluminum-foil paper is discolored after being printed, and the surface of the adhesive is skinned.)

1. A production process of red gold-printed aluminum foil paper is characterized by comprising the following steps:

1) adhering a hot melt adhesive to the PET film with the aluminum foil;

2) compounding the bright copper paper on the aluminum foil;

3) pressing the paper by a high-temperature roller with a built-in heater to obtain aluminum foil paper;

4) rolling the pressed aluminum foil paper;

5) the rolled aluminum foil paper is printed by an aluminum foil composite paper gravure printing machine and aqueous special color red ink, the printed aluminum foil paper sequentially passes through a composite oven device, the composite oven device comprises a first oven, a second oven, a third oven and a fourth oven which are separated by a partition board and are convenient for the aluminum foil paper to sequentially pass through, the temperature of the first oven is 130 +/-20 ℃, the temperature of the second oven is 130 +/-20 ℃, the temperature of the third oven is 100 +/-20 ℃, and the temperature of the fourth oven is 140 +/-20 ℃.

2. The process for producing red gold-printed aluminum-foil paper according to claim 1, wherein the printing speed in the printing in step 5) is 120 ± 10 m/min.

3. The process for producing red gold-printed aluminum-foil paper according to claim 1, wherein the rolling tension during the printing in step 5) is 200 ± 20N.

4. The process for producing red gold-printed aluminum foil paper as claimed in claim 3, wherein the unreeling tension in the printing process in the step 5) is 200 ± 20N.

5. The production process of red gold-printed aluminum-foil paper as claimed in claim 1, 2, 3 or 4, wherein the first oven, the second oven, the third oven and the fourth oven are vertically arranged from bottom to top; a first through hole through which the red gold-printed aluminum foil paper can conveniently pass is formed in a partition plate between the first oven and the second oven, a second through hole through which the red gold-printed aluminum foil paper can pass is formed in a partition plate between the second oven and the third oven, a third through hole through which the red gold-printed aluminum foil paper can pass is formed in a partition plate between the third oven and the fourth oven, transmission rollers externally connected with a driving motor are arranged in the first oven, the second oven, the third oven and the fourth oven, and infrared heating lamp tubes externally connected with an external power supply are arranged on the side walls of the first oven, the second oven, the third oven and the fourth oven; the paper inlet is formed in the side wall of one side of the first drying oven, the paper outlet is formed in the side wall of one side of the fourth drying oven, the top of the fourth drying oven is provided with an air outlet pipeline, and the air extractor is arranged on the air outlet pipeline.

6. The production process of red gold-printed aluminum-foil paper as claimed in claim 5, wherein a drying air inlet is arranged on the side wall of the first oven on the other side far away from the paper inlet; the relative humidity of the drying air is 5-10%.

7. The process for producing red gold-printed aluminum-foil paper according to claim 6, wherein the second through hole and the third through hole have the same width, and the first through hole has a width greater than the second through hole and the third through hole.

8. The production process of red gold-printed aluminum-foil paper as claimed in claim 6, wherein the partition boards at both sides of the second through hole and the second through hole are respectively provided with a heat transfer and dehumidification device, the heat transfer and dehumidification device comprises a ventilation cylinder and a rotating shaft, and the rotating shaft is connected with the side wall of the ventilation cylinder through a connecting rod; guide vanes are arranged on the upper portion and the lower portion of the rotating shaft, a pair of dehumidifying assemblies are arranged between the upper guide vane and the lower guide vane and are respectively positioned on two sides of the rotating shaft, each dehumidifying assembly comprises a driving roller, a driven roller and a flexible transmission belt arranged on the driving roller and the driven roller, the driving roller is in transmission connection with a rotating motor, an adsorption groove with a cambered surface is arranged on the transmission belt, and air holes are formed between the adsorption grooves; one side of the bottom of the adsorption tank is provided with a magnet with the working temperature of 150-400 ℃; molecular sieves are adsorbed in the adsorption tanks of the conveying belts and used for adsorbing water, and iron ball centers are arranged in the centers of the molecular sieves; when the molecular sieve adsorbs water which is 15-20% of the weight of the molecular sieve, the magnetic adsorption force between the magnet and the iron sphere center is smaller than the weight of the molecular sieve which is full of water, a blocking net for bearing the molecular sieve is also arranged between the conveying belt and the guide vane positioned at the lower part, and the center of the blocking net is provided with a through hole which is convenient for a rotating shaft to pass through; the dehumidification assembly is equipped with first work box and second work box respectively at both ends, the drive roll and rotate the motor and install in first work box, the driven roll is installed at the second work box, all be equipped with the diaphragm in first work box and the second work box, be located the region of the first work box on diaphragm upper portion and the region of second work box are used for accepting unused molecular sieve, are located the region of the first work box on diaphragm upper portion and the region of second work box are used for accepting the molecular sieve that absorbs saturated moisture and drop, it is equipped with the swash plate to block first work box one side that the net is close to the outside for the molecular sieve that will drop on blocking the net introduces the lower part region that is located the first work box or the second work box of diaphragm lower part, the section of thick bamboo of ventilating is close to swash plate one side and is equipped with the drainage groove of slope.

9. The process for producing red gold-printed aluminum-foil paper according to claim 8, wherein the driving rollers of the pair of dehumidifying assemblies are fixedly connected together, and the driven rollers of the pair of dehumidifying assemblies are fixedly connected together.

10. The process for producing red gold-printed aluminum-foil paper according to claim 8, wherein a stop ring is provided on the perforated outer barrier net.

Technical Field

The invention relates to the field of aluminum foil paper production and printing processes, in particular to a red gold-printed aluminum foil paper production process.

Background

Penetration, coagulation and polymerization of the ink on plain paper, and oxidation filming are the main forms of drying of the ink layer. However, the drying effect of the ink layer penetrating the paper is rapid and obvious in terms of the drying time of the ink layer printed on the paper, and the drying of the dry vegetable oil in the ink layer in the form of oxidation and polymerization which are gradually formed into a film layer after the dry vegetable oil is contacted with oxygen is a very slow process. It takes a period of time to complete the whole process of chemical and physical reactions. It can be seen that the combined action of the two results in the final result of complete drying of the print. The situation is different when printing on aluminium foil paper, which is mainly a significant change in its dry form. Since the aluminum foil paper cannot or hardly absorb the solvent in the ink, the solvent such as dry vegetable oil, high boiling point kerosene, etc. in the ink vehicle cannot penetrate into the paper and must be retained in the ink layer on the surface of the paper, so that the ink layer cannot be thickened and fixed quickly, and the ink layer loses the timing of initial drying. That is, the ink layer slowly polymerizes, and the drying process of the oxide film becomes the main dry form of the ink layer of the aluminum foil paper. The solvent retained in the ink layer can not make the ink quickly become thick, but can also prevent the ink layer from polymerizing and oxidizing, so that the drying speed is slower, but because the ink layer drying process is also an exothermic reaction process, the heat generated by the reaction can further promote the drying of the ink layer, and if the drying temperature is still kept unchanged in the later stage of drying, the actual ink layer surface temperature is higher than the pre-controlled temperature, so that the color of the printed aluminum foil paper is changed, and the surface of the adhesive is skinned.

The prior patent publication No. CN101293439 discloses a method for printing aluminum foil paper by a conventional printing machine, which comprises the steps of carrying out online gloss oil under the condition that printing ink is not dried, and drying the gloss oil on the surface of the printing ink rapidly by infrared drying. The infrared drying process adopts single temperature for drying, and the temperature of the surface of the actual ink layer is higher than the temperature which is pre-controlled if the drying temperature is still kept unchanged in the later stage of drying, so that the color of the printed aluminum foil paper is changed, and the surface of the adhesive is skinned.

Disclosure of Invention

The invention provides a production process of red gold-printed aluminum-foil paper aiming at the problems, and solves the defects that the existing production process of the red gold-printed aluminum-foil paper still keeps the constant drying temperature in the later stage of drying, so that the surface temperature of an actual ink layer is higher than the pre-controlled temperature, the aluminum-foil paper is discolored after being printed, and the surface of a binder is skinned.

The technical scheme adopted by the invention is as follows:

a production process of red gold-printed aluminum-foil paper comprises the following steps:

1) adhering a hot melt adhesive to the PET film with the aluminum foil;

2) compounding the bright copper paper on the aluminum foil;

3) pressing the paper by a high-temperature roller with a built-in heater to obtain aluminum foil paper;

4) rolling the pressed aluminum foil paper;

5) the rolled aluminum foil paper is printed by an aluminum foil composite paper gravure printing machine and aqueous special color red ink, the printed aluminum foil paper sequentially passes through a composite oven device, the composite oven device comprises a first oven, a second oven, a third oven and a fourth oven which are separated by a partition board and are convenient for the aluminum foil paper to sequentially pass through, the temperature of the first oven is 130 +/-20 ℃, the temperature of the second oven is 130 +/-20 ℃, the temperature of the third oven is 100 +/-20 ℃, and the temperature of the fourth oven is 140 +/-20 ℃. According to the invention, the composite oven device is adopted, four ovens with different drying temperatures are adopted, the drying temperature of the third oven in the later stage of drying is 100 +/-20 ℃, and the situation that the actual surface temperature of the ink layer is higher than the pre-controlled temperature, so that the aluminum foil paper is discolored after being printed and the surface of the adhesive is skinned is avoided. And when the solvent volatilization is near to the end, further, the third drying oven adopts the drying temperature slightly higher than the first drying oven and the second drying oven for shaping.

Optionally, the printing speed in the printing process in the step 5) is 120 +/-10 m/min.

Optionally, the winding tension in the printing process in the step 5) is 200 ± 20N.

Optionally, the unreeling tension in the printing process in the step 5) is 200 ± 20N.

Optionally, the first oven, the second oven, the third oven and the fourth oven are vertically arranged from bottom to top; a first through hole through which the red gold-printed aluminum foil paper can conveniently pass is formed in a partition plate between the first oven and the second oven, a second through hole through which the red gold-printed aluminum foil paper can pass is formed in a partition plate between the second oven and the third oven, a third through hole through which the red gold-printed aluminum foil paper can pass is formed in a partition plate between the third oven and the fourth oven, transmission rollers externally connected with a driving motor are arranged in the first oven, the second oven, the third oven and the fourth oven, and infrared heating lamp tubes externally connected with an external power supply are arranged on the side walls of the first oven, the second oven, the third oven and the fourth oven; the paper inlet is formed in the side wall of one side of the first drying oven, the paper outlet is formed in the side wall of one side of the fourth drying oven, the top of the fourth drying oven is provided with an air outlet pipeline, and the air extractor is arranged on the air outlet pipeline.

In the actual drying process of the ink, the drying of the ink layer first evaporates the moisture inside thereof because the moisture has the effect of hindering and suppressing the drying of the ink layer. Only after the water is evaporated, the ink layer can be effectively oxidized and polymerized until finally dried to form a film. On the one hand, the evaporation rate of water in the ink layer has a direct relationship with the ambient humidity in which it is located. When the ambient humidity increases, i.e., the air is relatively humid, the rate of evaporation of water from the ink layer becomes slow and the ink layer drying time increases. On the contrary, when the ambient humidity is lowered, i.e., the air is dry, the evaporation rate of the water in the ink layer is correspondingly increased, and the drying time of the ink layer is correspondingly shortened. On the other hand, when printing is performed in a relatively humid environment, the activity of oxygen in the air is not so active, which directly affects the oxygen intake of the ink layer, resulting in a slow film oxidation process, i.e., a slow drying process, which is another reason that the drying of the ink layer is affected by the ambient temperature. In southern areas, the air humidity is kept at 80% or even higher for a long time, and at such high humidity, the ink layer is too long in drying time, the moisture in the dried ink layer is difficult to control, and the defects of diluted ink color and no drying and dirt adhesion of the printed ink layer are easy to occur. According to the invention, the first oven, the second oven, the third oven and the fourth oven are arranged from bottom to top, so that the rising high-temperature air of the first oven and the second oven is effectively utilized, the requirement of the third oven on heat is reduced, heat loss is avoided, the energy sources of the third oven and the fourth oven are reduced, the energy source utilization rate is improved, and particularly, the third oven only needs lower heating temperature without starting more infrared heating lamp tubes.

Optionally, a drying air inlet is arranged on the side wall of the first oven on the other side far away from the paper inlet; the relative humidity of the drying air is 5-10%. The invention adopts the drying air with the relative humidity of 5-10 percent introduced into the reciprocating drying oven device to replace the prior high-humidity air, effectively reduces the moisture in the air in the drying process and is beneficial to the volatilization of the moisture in the ink.

Optionally, the second through hole and the third through hole have the same width, and the first through hole has a width greater than the second through hole and the third through hole.

Optionally, the partition plates on two sides of the second through hole and the second through hole are respectively provided with a heat transfer and dehumidification device, the heat transfer and dehumidification device comprises a ventilation cylinder and a rotating shaft, and the rotating shaft is connected with the side wall of the ventilation cylinder through a connecting rod; guide vanes are arranged on the upper portion and the lower portion of the rotating shaft, a pair of dehumidifying assemblies are arranged between the upper guide vane and the lower guide vane and are respectively positioned on two sides of the rotating shaft, each dehumidifying assembly comprises a driving roller, a driven roller and a flexible transmission belt arranged on the driving roller and the driven roller, the driving roller is in transmission connection with a rotating motor, an adsorption groove with a cambered surface is arranged on the transmission belt, and air holes are formed between the adsorption grooves; one side of the bottom of the adsorption tank is provided with a magnet with the working temperature of 150-400 ℃; molecular sieves are adsorbed in the adsorption tanks of the conveying belts and used for adsorbing water, and iron ball centers are arranged in the centers of the molecular sieves; when the molecular sieve adsorbs water which is 15-20% of the weight of the molecular sieve, the magnetic adsorption force between the magnet and the iron sphere center is smaller than the weight of the molecular sieve which is full of water, a blocking net for bearing the molecular sieve is also arranged between the conveying belt and the guide vane positioned at the lower part, and the center of the blocking net is provided with a through hole which is convenient for a rotating shaft to pass through; the dehumidification assembly is equipped with first work box and second work box respectively at both ends, the drive roll and rotate the motor and install in first work box, the driven roll is installed at the second work box, all be equipped with the diaphragm in first work box and the second work box, be located the region of the first work box on diaphragm upper portion and the region of second work box are used for accepting unused molecular sieve, are located the region of the first work box on diaphragm upper portion and the region of second work box are used for accepting the molecular sieve that absorbs saturated moisture and drop, it is equipped with the swash plate to block first work box one side that the net is close to the outside for the molecular sieve that will drop on blocking the net introduces the lower part region that is located the first work box or the second work box of diaphragm lower part, the section of thick bamboo of ventilating is close to swash plate one side and is equipped with the drainage groove of slope. The invention further adopts a heat transfer dehumidification device, when the air dried out of a large amount of moisture in the first drying oven and the second drying oven enters the heat transfer dehumidification device, the guide vanes are driven to rotate, and the guide vanes and the conveying belt reduce the air flow rate, so that the air enters the third drying oven slowly, the temperature in the third drying oven is prevented from rising too fast, and the third drying oven plays a role in blocking part of heat. A large amount of molecular sieves are adsorbed on a transmission belt driven by a rotating motor in the heat transfer and dehumidification device, air containing a large amount of moisture volatilized from a first oven and a second oven can be adsorbed, after the molecular sieves adsorb moisture which is 15-20% of the self weight, the magnetic adsorption force between a magnet and an iron sphere center is smaller than the weight of the molecular sieves which are saturated with the moisture, the molecular sieves fall on a blocking net, the molecular sieves falling on the blocking net are introduced into the lower area of a first working box or a second working box which are positioned at the lower part of a transverse plate through a drainage groove and an inclined plate, the molecular sieves which are gathered at the upper area of the first working box or the second working box and do not absorb water can be pushed or waited to fall in the transmission belt, and then the transmission belt can keep a good water absorption effect.

Optionally, the driving rollers of the pair of dehumidification assemblies are fixedly connected together, and the driven rollers of the pair of dehumidification assemblies are fixedly connected together.

Optionally, the stop collar is present on the perforated outer barrier net.

(III) advantageous effects

1. According to the invention, the composite oven device is adopted, four ovens with different drying temperatures are adopted, the drying temperature of the third oven in the later stage of drying is 100 +/-20 ℃, and the situation that the actual surface temperature of the ink layer is higher than the pre-controlled temperature, so that the aluminum foil paper is discolored after being printed and the surface of the adhesive is skinned is avoided. And when the solvent volatilization is near to the end, further, the third drying oven adopts the drying temperature slightly higher than the first drying oven and the second drying oven for shaping.

2. According to the invention, the first oven, the second oven, the third oven and the fourth oven are arranged from bottom to top, so that the rising high-temperature air of the first oven and the second oven is effectively utilized, the requirement of the third oven on heat is reduced, heat loss is avoided, the energy sources of the third oven and the fourth oven are reduced, the energy source utilization rate is improved, and particularly, the third oven only needs lower heating temperature without starting more infrared heating lamp tubes.

3. The invention further adopts a heat transfer dehumidification device, when the air dried out of a large amount of moisture in the first drying oven and the second drying oven enters the heat transfer dehumidification device, the guide vanes are driven to rotate, and the guide vanes and the conveying belt reduce the air flow rate, so that the air enters the third drying oven slowly, the temperature in the third drying oven is prevented from rising too fast, and the third drying oven plays a role in blocking part of heat. A large amount of molecular sieves are adsorbed on a transmission belt driven by a rotating motor in the heat transfer and dehumidification device, air containing a large amount of moisture volatilized from a first oven and a second oven can be adsorbed, after the molecular sieves adsorb moisture which is 15-20% of the self weight, the magnetic adsorption force between a magnet and an iron sphere center is smaller than the weight of the molecular sieves which are saturated with the moisture, the molecular sieves fall on a blocking net, the molecular sieves falling on the blocking net are introduced into the lower area of a first working box or a second working box which are positioned at the lower part of a transverse plate through a drainage groove and an inclined plate, the molecular sieves which are gathered at the upper area of the first working box or the second working box and do not absorb water can be pushed or waited to fall in the transmission belt, and then the transmission belt can keep a good water absorption effect.

Description of the drawings:

FIG. 1 is a cross-sectional view of a composite oven apparatus of example 4 of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1 of the composite oven apparatus of example 4 of the present invention;

fig. 3 is a partially enlarged view of a portion B of the conveyor belt of fig. 1 of the composite oven apparatus of example 4 of the present invention;

FIG. 4 is a top view of a heat transfer dehumidifier of the composite oven apparatus of example 4 of the present invention;

FIG. 5 is a cross-sectional view of the molecular sieve of the composite oven apparatus of example 4 of the present invention;

fig. 6 is a structural view of a barrier net of the composite oven apparatus of example 4 of the present invention.

The figures are numbered:

1. the drying device comprises a first drying oven, a second drying oven, a third drying oven, a fourth drying oven, a partition plate, a first through hole, a second through hole, a third through hole, a transmission roller, a fourth drying oven, a partition plate, a second through hole, a partition plate.

The specific implementation mode is as follows:

the present invention will be described in detail below with reference to the accompanying drawings.