CN115806774A - Deep-color alumite suitable for high-speed hot stamping and preparation method thereof - Google Patents
Deep-color alumite suitable for high-speed hot stamping and preparation method thereof Download PDFInfo
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Abstract
The invention discloses deep color alumite suitable for high-speed hot stamping and a preparation method thereof, and relates to the field of hot stamping materials. The deep-color alumite comprises a thin film layer, a release layer, a color layer, an aluminum layer and an adhesive layer which are sequentially arranged; the release layer is made of a release agent, and the release agent comprises raw materials of water-based wax, water-soluble cellulose, water, alcohol and isopropanol; the weight ratio of the aqueous wax to the dry weight of the water-soluble cellulose is 0.098: (0.008-0.010); the weight ratio of the water, the alcohol and the isopropanol is 12 (11.5-13.5) to 2-3; the weight ratio of the water-soluble cellulose to the water is (0.003-0.004): 1. The deep color alumite has the advantages that the peeling force between the thin film layer and the color layer is small, and the deep color alumite can be still suitable for high-speed hot stamping after being stored for a long time.
Description
Technical Field
The invention relates to the field of hot stamping materials, in particular to deep-color alumite suitable for high-speed hot stamping and a preparation method thereof.
Background
The conventional electrochemical aluminum comprises a film layer, a release layer, a color layer, an aluminum layer and an adhesive layer. Dark colored alumite refers to alumite with a darker color layer. Wherein, when producing dark colored electrochemical aluminum product, the chromatograph need to incorporate a great amount of dyestuff. However, due to the incorporation of a large amount of dye, the peeling force between the dark-colored alumite thin film layer and the color layer tends to increase with time. When the deep color alumite is placed for a long time and the hot stamping speed of the deep color alumite is high, the problem that the patterns are incomplete or unclear is easy to occur. Therefore, the deep color alumite in the related technology is difficult to be applied to stable high-speed hot stamping.
In view of the above problems, the inventor has tried to design two release layers or two color layers, and both of the two ways can improve the problem of incomplete or unclear deep color alumite high-temperature hot stamping patterns to some extent. However, in both of the two modes, a process is added, which not only reduces the production efficiency, but also increases the production cost.
Therefore, the method has important research significance on how to realize the hot stamping integrity and the clarity of the deep-color alumite and reduce the influence on the production efficiency and the production cost of the deep-color alumite as much as possible.
Disclosure of Invention
In order to improve the completeness and the definition of deep-color alumite hot stamping in the related technology and reduce the influence on the production efficiency and the production cost of the deep-color alumite as much as possible, the application provides deep-color alumite suitable for high-speed hot stamping and a preparation method thereof.
First aspect, the dark colour electrochemical aluminium that this application provided is applicable to high-speed thermoprint adopts following technical scheme: a dark color alumite suitable for high-speed hot stamping comprises a film layer, a release layer, a color layer, an aluminum layer and an adhesive layer which are sequentially arranged; the release layer is made of a release agent, and the release agent comprises raw materials of water-based wax, water-soluble cellulose, water, alcohol and isopropanol; the weight ratio of the aqueous wax to the dry weight of the water-soluble cellulose is 0.098: (0.008-0.010); the weight ratio of the water, the alcohol and the isopropanol is 12 (11.5-13.5) to 2-3; the weight ratio of the water-soluble cellulose to the water is (0.003-0.004): 1.
To the problem that hot stamping patterns are not clear or incomplete easily appearing in the high-speed hot stamping of dark color electrochemical aluminum, the inventor adds water-soluble cellulose and isopropanol in a release layer. Wherein, the addition of water-soluble cellulose can better barrier color layer and thin layer relevance, has reduced the increase rate of peel strength between thin layer and the chromatograph, can realize the separation of thin layer and chromatograph more easily to ensure that dark color electrochemical aluminium still can keep the integrality and the definition of pattern at high-speed thermoprint in-process after storing for a long time. However, after the water-soluble cellulose is added, the viscosity of the release agent is increased, the leveling property is poor, isopropanol needs to be added in a matching manner to improve the leveling property of the release agent, otherwise, the problem that the water-based wax caused by local shrinkage is difficult to disperse uniformly easily occurs on the release layer, the problem that the hot stamping speed of the deep color electrochemical aluminum is unstable in the high-temperature hot stamping process is easily caused, and the problem that the hot stamping pattern of the deep color electrochemical aluminum is unclear or incomplete is easily caused. Therefore, the water-soluble cellulose and the isopropanol need to be used together.
Compared with the method of adding a release layer and a color layer, the production efficiency is better when water-soluble cellulose and isopropanol are added into the release layer, and the production cost is lower. According to statistics, compared with the mode of adding a release layer or adding a color layer, the deep color alumite suitable for high-speed hot stamping can improve the production rate by at least 30% and reduce the production cost by at least 20%. Is particularly suitable for high-speed hot stamping in circular high-speed hot stamping equipment.
Optionally, the water-soluble cellulose is selected from one or more of hydroxymethyl cellulose with etherification degree of 0.4-1.2, hydroxyethyl cellulose with 2% aqueous solution viscosity of 1000-10000mpa.s, and methyl cellulose with 2% aqueous solution viscosity of 1000-4000 mpa.s.
When the hydroxymethyl cellulose, the hydroxyethyl cellulose and the methyl cellulose in the parameter range are selected as the water-soluble cellulose, the compatibility and the uniform dispersibility of the water-soluble cellulose in the water-based wax can be effectively improved, and the film layer and the color layer can be further effectively separated.
Optionally, the water-soluble cellulose comprises hydroxymethyl cellulose with the etherification degree of 0.8-1.0, hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 3000-5000mpa.s and methyl cellulose with the viscosity of 2% aqueous solution of 2000-3000mpa.s, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.8-1.0, the hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 1000-5000mpa.s and the methyl cellulose with the viscosity of 2% aqueous solution of 2000-3000mpa.s is (3-4): 5: (1-2).
When the water-soluble cellulose is a composition of hydroxymethyl cellulose, hydroxyethyl cellulose and methyl cellulose in the parameter range and the proportioning range, the uniform dispersion performance of the release layer is further improved, the peeling force between the film layer and the color layer is favorably further reduced, the hot stamping speed of the deep-color alumite can reach more than 90 m/min, and the domestic advanced level is reached.
Optionally, the color layer is made of an imaging paint, the imaging paint comprises an acrylic resin polymer, a dye, a defoaming agent, a dispersing agent and a solvent, the weight ratio of the acrylic resin polymer to the solvent is (3.5-4.5) to (5.5-6.5), wherein the dye is incorporated in an amount of 20-25wt% of the acrylic resin polymer, the defoaming agent is incorporated in an amount of 0.5-1.0wt% of the acrylic resin polymer, and the dispersing agent is incorporated in an amount of 1-5wt% of the acrylic resin polymer; the solvent comprises butanone and n-propyl ester, and the weight ratio of the butanone to the n-propyl ester is (4.5-5.5): 1.
The imaging coating prepared from the raw materials has the advantages of clear color development and high adhesion fastness with an aluminum layer. In addition, the solvent is a mixed solution of butanone and n-propyl ester, which is favorable for reducing the problems of deep color alumite edge shrinkage and the like.
Optionally, the dispersing agent comprises sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether, and the weight ratio of the sodium methylene dinaphthalene sulfonate to the polyoxyethylene alkylphenol ether is 1 (3-4).
When the dispersing agent is a composition of sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether 1 (3-4), the stability of the dye in the imaging coating can be effectively improved, so that the imaging coating is not easy to separate out and layer, the increase rate of the peeling force between a color layer and a film layer is reduced, and the hot stamping stability of the deep-color alumite is improved. Meanwhile, the dispersant can further improve the adhesion fastness of the color layer and the aluminum layer.
Optionally, the adhesive layer is made of an adhesive, the adhesive comprises a resin composition and a diluent, and the weight ratio of the resin composition to the diluent is (3.5-4.5): (5.5-6.5); wherein the resin composition comprises 15-20wt% of vinyl chloride-vinyl acetate resin, 30-50wt% of rosin resin, 30-40 wt% of acrylic resin and 5-10wt% of silicon dioxide; the diluent comprises toluene and n-butanol, and the weight ratio of the toluene to the n-butanol is (2.5-3.5): 1.
The adhesive can be used for stably hot-stamping the alumite on a printing stock, and in addition, the adhesive has good dispersibility, can adapt to higher coating speed and simultaneously can not corrode a color layer.
In a second aspect, the preparation method of the deep-color alumite suitable for high-speed hot stamping provided by the application adopts the following technical scheme:
a preparation method of deep color alumite suitable for high-speed hot stamping comprises the following steps:
coating release agent on the film layer, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 0.045-0.065g/m 2 Curing and molding to obtain a release layer;
coating an imaging coating on the side of the release layer, which is far away from the base film layer, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 1.4-1.5g/m 2 Curing to obtain a color layer;
pressing a pattern on the color layer; the mould pressing temperature is 172-175 ℃, and the mould pressing speed is 50-60 m/min;
plating aluminum on the area corresponding to the pattern to obtain an aluminum layer, wherein the optical density of the aluminum layer is controlled to be 1.5-1.7;
coating adhesive on the side of the aluminum layer away from the release layer, wherein the coating speed is controlled to be 100-110 m/min, and the coating dry weight is controlled to be 2.0-2.2g/m 2 And solidifying to obtain the electrochemical aluminum.
The coating speed of the release agent is controlled to be 80-85 m/min, so that the uniform dispersion effect of the release agent on the film layer can be improved; the imaging coating is controlled at 80-85 m/min, which is favorable for obtaining a color layer with uniform chromaticity, the optical density of aluminum is controlled at 1.5-1.7, the aluminum has better reflection effect, and the adhesion stability is better.
Optionally, the curing of the release agent is performed in an oven, the oven is divided into five zones, wherein the first zone is controlled to be 75-85 ℃, the second zone is controlled to be 90-110 ℃, the third zone is controlled to be 135-145 ℃, the fourth zone is controlled to be 135-145 ℃ and the fifth zone is controlled to be 105-115 ℃.
The arc-shaped temperature gradient is adopted to dry the release agent, so that the full volatilization of water, alcohol and isopropanol is promoted, and the instant drying of the surface of the release layer is prevented, thereby sealing the slowly-volatilized solvent in the inner layer.
Optionally, the curing of the imaging coating is performed in an oven, the oven is divided into five zones, wherein the first zone is controlled to be 80-85 ℃, the second zone is controlled to be 120-125 ℃, the third zone is controlled to be 160-165 ℃, the fourth zone is controlled to be 160-165 ℃, and the fifth zone is controlled to be 140-145 ℃.
The arc-shaped temperature gradient is adopted to dry the imaging coating, so that the problem of poor dispersion of the surface of the color layer caused by too fast volatilization of the solvent can be prevented, and the problem that the solvent which is slowly volatilized can not escape due to instant drying of the color layer can be prevented.
Optionally, the curing of the adhesive is performed in an oven, the oven is divided into five zones, wherein the first zone is controlled to be 70-75 ℃, the second zone is controlled to be 100-105 ℃, the third zone is controlled to be 125-130 ℃, the fourth zone is controlled to be 125-130 ℃, and the fifth zone is controlled to be 100-105 ℃.
The adoption of the arc-shaped temperature gradient to dry the adhesive is beneficial to preventing the problem that the dispersion of the surface of the adhesive is not good caused by the too fast volatilization of the diluent, and simultaneously, the problem that the slow volatilization diluent cannot escape because the adhesive is dried through instantly can be prevented.
To sum up, the technical scheme of this application's beneficial effect:
the utility model provides a dark color electrochemical aluminium has that the peel force of thin layer and chromatograph changes for a short time, and dark color electrochemical aluminium still can be applicable to the advantage of high-speed thermoprint after storing for a long time.
Drawings
FIG. 1 shows a release layer in the case where dispersion unevenness is caused by local shrinkage.
Fig. 2 is a release layer with uniform dispersion and no local shrinkage.
Detailed Description
The present application is further described below with reference to specific examples and comparative examples.
Examples
Examples 1 to 3
The utility model provides a dark colour electrochemical aluminium suitable for high-speed thermoprint, includes the thin layer that sets up once, from type layer, chromatograph, aluminium lamination and adhesive layer.
The preparation method of the alumite with stable high-speed hot stamping speed comprises the following steps:
s1, coating a release agent on the film layer, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 0.045-0.065g/m 2 Curing and molding to obtain a release layer; in the examples 1-3, the coating speed of the release agent was controlled at 80 m/min, and the coating dry weight was controlled at 0.055g/m 2 (ii) a Curing the release agent in an oven, wherein the oven is divided into five regions, wherein the first region is controlled to be 75-85 ℃, the second region is controlled to be 90-110 ℃, the third region is controlled to be 135-145 ℃, the fourth region is controlled to be 135-145 ℃ and the fifth region is controlled to be 105-115 ℃;
s2, coating the side of the release layer, which is far away from the base film layer, with an imaging coating, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 1.4-1.5g/m 2 Curing to obtain a color layer; in examples 1-3, the coating speed of the image forming coating was controlled to 85 m/min, and the coating dry weight was controlled to 1.45g/m 2 (ii) a The curing of the imaging coating is carried out in a drying oven, the drying oven is divided into five areas, wherein the first area is controlled to be 80-85 ℃, the second area is controlled to be 120-125 ℃, the third area is controlled to be 160-165 ℃, the fourth area is controlled to be 160-165 ℃ and the fifth area is controlled to be 140-145 ℃;
s3, pressing patterns on the color layer; the mould pressing temperature is 172-175 ℃, and the mould pressing speed is 50-60 m/min; in the examples 1 to 3, the molding temperature was 172 to 175 ℃ and the molding speed was 55 m/min;
s4, aluminum plating is carried out on the area corresponding to the pattern to obtain an aluminum layer, and the optical density of the aluminum layer is controlled to be 1.5-1.7; in examples 1 to 3, the optical density of the aluminum layer was controlled to 1.6;
s5, coating an adhesive on one side of the aluminum layer, which is far away from the release layer, wherein the coating speed is controlled to be 100-110 m/min, and the coating dry weight is controlled to be 2.0-2.2g/m 2 Solidifying to obtain the electrochemical aluminum; in the examples 1 to 3, the coating speed of the adhesive was controlled to 100 m/min, and the coating dry weight was controlled to 2.1g/m 2 (ii) a The adhesive is cured in a baking oven which is divided into five areas, wherein the first area is controlled to be 70-75 ℃, the second area is controlled to be 100-105 ℃, the third area is controlled to be 125-130 ℃, the fourth area is controlled to be 125-130 ℃ and the fifth area is controlled to be 100-105 ℃.
In addition, in examples 1 to 3, the raw material ratios of the release agent, the image forming coating material and the adhesive are shown in table 1 below. Wherein, the solvents in the embodiments 1 to 3 comprise butanone and n-propyl ester, and the diluents comprise toluene and n-butanol. Specifically, the weight ratio of butanone to n-propyl ester in the solvent of example 1 is 4.5; the weight ratio of toluene to n-butanol in the diluent of example 1 was 2.5.
In examples 1 to 3:
the preparation of the mold release agent comprises the following steps:
step one, heating water to 75-95 ℃, adding water-soluble cellulose while stirring, heating and stirring until the water-soluble cellulose is dissolved;
step two, adding alcohol into the product obtained in the step one, stirring uniformly and filtering;
and step three, adding isopropanol and water-based wax into the filtrate obtained in the step two, and uniformly stirring to obtain the release agent.
When the imaging coating is prepared, firstly, the dye is added into the solvent, the mixture of the acrylic resin, the defoaming agent and the dispersing agent are sequentially added after the dye is filtered, and the imaging coating can be prepared after the mixture is uniformly stirred.
When the adhesive is prepared, the resin composition is uniformly dispersed into the diluent.
TABLE 1 proportioning of the raw materials (unit/kg)
The water-based wax is a German ACMOS 5017 water-based release agent, and the solid content is 20%.
The water-soluble cellulose is hydroxymethyl cellulose with etherification degree of 0.4.
The acrylic resin polymer selects BR-85 acrylic resin.
The dye is an environment-friendly dye special for A85 cigarette packets.
The defoaming agent is an organic silicon defoaming agent.
The dispersant is methylene dinaphthalene sodium sulfonate.
The vinyl chloride-vinyl acetate copolymer resin is selected from SOLBINA vinyl chloride-vinyl acetate copolymer resin, and the vinyl acetate content of the vinyl chloride-vinyl acetate copolymer resin is 2.0-4.0%.
138# rosin resin is selected as the rosin resin.
The acrylic resin is BR-85 acrylic resin.
The above specific raw materials can be purchased from the market.
Example 4
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is hydroxyethyl cellulose with a viscosity of 1000mpa.s in 2% water solution.
Example 5
The utility model provides a dark colour electrochemical aluminium suitable for high-speed thermoprint, the difference with embodiment 2 lies in:
the water-soluble cellulose is methylcellulose with a viscosity of 1000mpa.s in 2% water solution.
Example 6
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with the etherification degree of 0.4, hydroxyethyl cellulose with the viscosity of a 2% aqueous solution of 1000mpa.s and methyl cellulose with the viscosity of a 2% aqueous solution of 1000mpa.s, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.4, the hydroxyethyl cellulose with the viscosity of a 2% aqueous solution of 4000mpa.s and the methyl cellulose with the viscosity of a 2% aqueous solution of 1000mpa.s is 3.5.
Example 7
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with the etherification degree of 0.9, hydroxyethyl cellulose with the viscosity of 4000mpa.s in a 2% aqueous solution and methyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.9, the hydroxyethyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution and the methyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution is 3.5:5:1.5.
example 8
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with the etherification degree of 0.9, hydroxyethyl cellulose with the viscosity of 4000mpa.s in a 2% aqueous solution and methyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.9, the hydroxyethyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution and the methyl cellulose with the viscosity of 2500mpa.s in a 2% aqueous solution is 1.5:5:3.5.
example 9
The utility model provides a dark colour electrochemical aluminium suitable for high-speed thermoprint, the difference with embodiment 2 lies in:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with the etherification degree of 0.4, hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 4000mpa.s and methyl cellulose with the viscosity of 2% aqueous solution of 2500mpa.s, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.9, the hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 4000mpa.s and the methyl cellulose with the viscosity of 2% aqueous solution of 2500mpa.s is 3.5:5:1.5.
example 10
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with the etherification degree of 0.9, hydroxyethyl cellulose with the viscosity of a 2% aqueous solution of 1000mpa.s and methyl cellulose with the viscosity of a 2% aqueous solution of 2500mpa.s, and the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.9, the hydroxyethyl cellulose with the viscosity of a 2% aqueous solution of 1000mpa.s and the methyl cellulose with the viscosity of a 2% aqueous solution of 2500mpa.s is 3.5:5:1.5.
example 11
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 2 in that:
the water-soluble cellulose is a mixture of hydroxymethyl cellulose with etherification degree of 0.9, hydroxyethyl cellulose with 2% aqueous solution viscosity of 4000mpa.s and methyl cellulose with 2% aqueous solution viscosity of 1000mpa.s, and the weight ratio of the hydroxymethyl cellulose with etherification degree of 0.9, the hydroxyethyl cellulose with 2% aqueous solution viscosity of 1000mpa.s and the methyl cellulose with 2% aqueous solution viscosity of 1000mpa.s is 3.5:5:1.5.
example 12
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 7 in that:
the dispersant is polyoxyethylene alkylphenol ether.
Example 13
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 7 in that:
the dispersing agent comprises sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether, and the weight ratio of the sodium methylene dinaphthalene sulfonate to the polyoxyethylene alkylphenol ether is 1.
Example 14
The deep color alumite suitable for high-speed hot stamping is different from the embodiment 7 in that:
the dispersing agent comprises sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether, and the weight ratio of the sodium methylene dinaphthalene sulfonate to the polyoxyethylene alkylphenol ether is 4.
Comparative example
Comparative example 1
A dark colored alumite which differs from example 1 in that:
the water-soluble cellulose in the release agent is replaced by the same amount of water-soluble wax.
Comparative example 2
A dark colored alumite which differs from example 1 in that:
the isopropanol in the mold release agent is replaced by equal amount of alcohol.
Comparative example 3
A dark colored alumite which differs from example 1 in that:
the weight ratio of the aqueous wax to the dry weight of the water-soluble cellulose is 3.
Comparative example 4
A dark colored alumite which differs from example 1 in that:
the weight ratio of the aqueous wax to the dry weight of the water-soluble cellulose is 20.
Performance test data
1. And (3) testing the peeling force: the test is carried out according to GB/T25256-2010 test method for the peeling force and the residual adhesion rate of the release film 180 of the optical functional film, and the test speed is 300mm/min and the unit is mN/mm.
2. Maximum hot stamping speed: the hot stamping speed can meet the requirement of hot stamping fastness and keep complete and clear color layers under the conditions that the hot stamping temperature is 250 ℃ and the hot stamping pressure is 3000 KPa.
TABLE 2 Properties of dark colored alumite
Analysis of results
Comparative example 1 is different from example 1 in that the water-soluble cellulose in the release agent is replaced with an equal amount of aqueous wax. The data in table 2 show that the addition of a proper amount of water-soluble cellulose into the release agent is beneficial to increasing the barrier effect of the thin film layer and the color layer, is beneficial to reducing the peeling force, can also reduce the growth rate of the peeling force of the thin film layer and the color layer along with the increase of time, and can enable deep color alumite to be still suitable for high-speed hot stamping after being placed for a long time.
Comparative example 2 is different from example 1 in that isopropanol in the mold release agent is replaced with an equal amount of alcohol. However, when alcohol is used for replacing isopropanol, the improvement of the leveling performance of the release agent is not facilitated, the release layer is prone to having the problem that the water-based wax is difficult to disperse uniformly due to local shrinkage, so that the speed of the deep-color alumite in the high-speed hot stamping process is difficult to keep stable, and the problem that patterns are incomplete easily occurs in hot stamping. Wherein, this application figure 1 demonstrates from the type layer has the dispersion when uneven that local shrink leads to the state, and figure 2 demonstrates from the type layer homodisperse, the state when not having local shrink.
Comparative example 3 differs from example 1 in that the weight ratio of aqueous wax to water-soluble cellulose is 3. Among them, the incorporation amount of the water-soluble cellulose in comparative example 3 was greatly increased as compared with example 1. As can be seen from the data in table 2, the problem that the water-based wax is difficult to uniformly disperse is also easily caused after the water-soluble cellulose is excessively added, so that the problem of incomplete pattern is easily caused in the hot stamping.
Comparative example 4 differs from example 1 in that the weight ratio of aqueous wax to water-soluble cellulose is 20. In which the amount of water-soluble cellulose incorporated in comparative example 3 was greatly reduced as compared with example 1. The data in table 2 show that too small amount of water-soluble cellulose is easy to deteriorate the barrier property between the film layer and the color layer, and the peeling force between the film layer and the color layer in the deep color alumite is obviously increased along with the increase of time, so that the deep color alumite is difficult to adapt to the requirement of high-speed hot stamping after being placed for a long time.
Examples 4 to 11 differ from example 2 in the type selection of the water-soluble cellulose in the release agent. As can be seen from the data in Table 2, when the aqueous cellulose is selected from hydroxymethylcellulose having a degree of etherification of 0.8 to 1.0, hydroxyethylcellulose having a 2% aqueous solution viscosity of 1000 to 5000mpa.s, and methylcellulose (3 to 4) having a 2% aqueous solution viscosity of 2000 to 3000mpa.s: 5: and (1-2) when the composition is in the range, the stripping force between the film layer and the color layer in the deep-color alumite is obviously reduced, the growth rate of the stripping force along with the time extension is also reduced, and the hot stamping speed and the hot stamping stability of the deep-color alumite are improved while complete and clear hot stamping patterns are obtained.
Examples 12-14 differ from example 7 in the selection of the dispersant in the imaging coating. The dye content of the color layer in the application is high, the problem of layering is easy to occur after the imaging coating is placed for a long time, but the problem can be effectively solved when the composition of sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether 1 (3-4) is adopted as the dispersing agent. Meanwhile, the data in table 2 show that when the composition is in the range of (3-4) of sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether 1, the stripping force between the deep color alumite film layer and the color layer and the increase rate of the stripping force along with time can be further reduced, and the hot stamping speed and the hot stamping stability of the deep color alumite can be further improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a dark color electrochemical aluminium suitable for high-speed thermoprint which characterized in that: the adhesive comprises a film layer, a release layer, a color layer, an aluminum layer and an adhesive layer which are arranged in sequence; the release layer is made of a release agent, and the release agent comprises raw materials of water-based wax, water-soluble cellulose, water, alcohol and isopropanol; the weight ratio of the water-based wax to the dry weight of the water-soluble cellulose is 0.098: (0.008-0.010); the weight ratio of the water, the alcohol and the isopropanol is 12 (11.5-13.5) to 2-3; the weight ratio of the water-soluble cellulose to the water is (0.003-0.004): 1.
2. The dark colored alumite suitable for high speed stamping according to claim 1, wherein: the water-soluble cellulose is selected from one or more of hydroxymethyl cellulose with etherification degree of 0.4-1.2, hydroxyethyl cellulose with 2% aqueous solution viscosity of 1000-10000mpa.s, and methyl cellulose with 2% aqueous solution viscosity of 1000-4000 mpa.s.
3. The deep color alumite suitable for high speed stamping according to claim 1, wherein: the water-soluble cellulose comprises hydroxymethyl cellulose with the etherification degree of 0.8-1.0, hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 3000-5000mpa.s and methyl cellulose with the viscosity of 2% aqueous solution of 2000-3000mpa.s, wherein the weight ratio of the hydroxymethyl cellulose with the etherification degree of 0.8-1.0, the hydroxyethyl cellulose with the viscosity of 2% aqueous solution of 1000-5000mpa.s to the methyl cellulose with the viscosity of 2% aqueous solution of 2000-3000mpa.s is (3-4): 5: (1-2).
4. The deep color alumite suitable for high speed stamping according to claim 1, wherein: the color layer is made of imaging paint, the imaging paint comprises acrylic resin polymer, dye, defoaming agent, dispersing agent and solvent, the weight ratio of the acrylic resin polymer to the solvent is (3.5-4.5) - (5.5-6.5), wherein the doping amount of the dye is 20-25wt% of the acrylic resin polymer, the doping amount of the defoaming agent is 0.5-1.0wt% of the acrylic resin polymer, the doping amount of the dispersing agent is 1-5wt% of the acrylic resin polymer, the solvent comprises butanone and n-propyl ester, and the weight ratio of the butanone to the n-propyl ester is (4.5-5.5): 1.
5. The dark colored alumite suitable for high speed stamping according to claim 1, wherein: the dispersing agent comprises sodium methylene dinaphthalene sulfonate and polyoxyethylene alkylphenol ether, wherein the weight ratio of the sodium methylene dinaphthalene sulfonate to the polyoxyethylene alkylphenol ether is 1 (3-4).
6. The dark colored alumite suitable for high speed stamping according to claim 1, wherein: the adhesive layer is made of an adhesive, the adhesive comprises a resin composition and a diluent, and the weight ratio of the resin composition to the diluent is (3.5-4.5): (5.5-6.5); wherein the resin composition comprises 15-20wt% of vinyl chloride-vinyl acetate resin, 30-50wt% of rosin resin, 30-40 wt% of acrylic resin and 5-10wt% of silicon dioxide; the diluent comprises toluene and n-butanol, and the weight ratio of the toluene to the n-butanol is (2.5-3.5): 1.
7. The method for preparing dark colored alumite suitable for high-speed hot stamping according to any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps:
coating release agent on the film layer, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 0.045-0.065g/m 2 Curing and molding to obtain a release layer;
coating an imaging coating on the side of the release layer, which is far away from the base film layer, wherein the coating speed is controlled to be 80-85 m/min, and the coating dry weight is controlled to be 1.4-1.5g/m 2 Curing to obtain a color layer;
pressing a pattern on the color layer; the mould pressing temperature is 172-175 ℃, and the mould pressing speed is 50-60 m/min;
plating aluminum on the area corresponding to the pattern to obtain an aluminum layer, wherein the optical density of the aluminum layer is controlled to be 1.5-1.7;
coating adhesive on the side of the aluminum layer away from the release layer, wherein the coating speed is controlled to be 100-110 m/min, and the coating dry weight is controlled to be 2.0-2.2g/m 2 And solidifying to obtain the electrochemical aluminum.
8. The preparation method of the dark colored alumite suitable for high-speed hot stamping according to claim 7, characterized in that: the curing of the release agent is carried out in an oven, the oven is divided into five regions, wherein the temperature of the first region is controlled to be 75-85 ℃, the temperature of the second region is controlled to be 90-110 ℃, the temperature of the third region is controlled to be 135-145 ℃, the temperature of the fourth region is controlled to be 135-145 ℃, and the temperature of the fifth region is controlled to be 105-115 ℃.
9. The preparation method of the dark colored alumite suitable for high-speed hot stamping according to claim 7, characterized in that: the curing of the imaging coating is carried out in an oven, the oven is divided into five zones, wherein the first zone is controlled to be 80-85 ℃, the second zone is controlled to be 120-125 ℃, the third zone is controlled to be 160-165 ℃, the fourth zone is controlled to be 160-165 ℃ and the fifth zone is controlled to be 140-145 ℃.
10. The preparation method of the deep color electrochemical aluminum suitable for high-speed hot stamping according to claim 7, characterized in that: the curing of the adhesive is carried out in an oven, the oven is divided into five regions, wherein the temperature of the first region is controlled to be 70-75 ℃, the temperature of the second region is controlled to be 100-105 ℃, the temperature of the third region is controlled to be 125-130 ℃, the temperature of the fourth region is controlled to be 125-130 ℃, and the temperature of the fifth region is controlled to be 100-105 ℃.
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| CN102516906A (en) * | 2011-12-16 | 2012-06-27 | 北京石油化工学院 | Method for preparing ethanol-soluble laminating adhesive |
| CN103009857A (en) * | 2012-12-21 | 2013-04-03 | 武汉虹之彩包装印刷有限公司 | Electric aluminum sheet up to quality safety performance standard |
| CN109624577A (en) * | 2018-12-25 | 2019-04-16 | 绍兴虎彩激光材料科技有限公司 | A kind of the cold wave film formulation and its preparation process of high cold wave fastness |
| CN112898901A (en) * | 2021-01-21 | 2021-06-04 | 恒丰材料科技(浙江)股份有限公司 | Release agent for hot stamping |
| CN114031983A (en) * | 2021-10-29 | 2022-02-11 | 绍兴虎彩激光材料科技有限公司 | Silk-screen cold-stamping film coating and preparation process thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516906A (en) * | 2011-12-16 | 2012-06-27 | 北京石油化工学院 | Method for preparing ethanol-soluble laminating adhesive |
| CN103009857A (en) * | 2012-12-21 | 2013-04-03 | 武汉虹之彩包装印刷有限公司 | Electric aluminum sheet up to quality safety performance standard |
| CN109624577A (en) * | 2018-12-25 | 2019-04-16 | 绍兴虎彩激光材料科技有限公司 | A kind of the cold wave film formulation and its preparation process of high cold wave fastness |
| CN112898901A (en) * | 2021-01-21 | 2021-06-04 | 恒丰材料科技(浙江)股份有限公司 | Release agent for hot stamping |
| CN114031983A (en) * | 2021-10-29 | 2022-02-11 | 绍兴虎彩激光材料科技有限公司 | Silk-screen cold-stamping film coating and preparation process thereof |
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