Gold stamping film and preparation method thereof

Abstract

The invention discloses a preparation method of a gold stamping film. The preparation method comprises the following steps: step 1, adopting a PET (Polyethylene Terephthalate) base film as a substrate layer, coating a release layer on the substrate layer, arranging a color printing layer on the release layer, arranging a mould pressing layer on the color printing layer, and arranging an electroplated layer on the mould pressing layer; the hot stamping film adopts a PET base film as a matrix layer, the matrix layer is coated with a release layer, the hot stamping film is attached to a to-be-attached product through layer improvement treatment and a hot-melt adhesive agent to form a hot-melt adhesive layer, the hot-melt adhesive agent is prepared from ethylene glycol, polyoxypropylene glycol and acrylic resin through a blending regulator and a matching agent, and the raw materials are blended, coordinated and co-synergized, so that the hot stamping film has a good hot-melt adhesive effect on the to-be-attached product. The obtained gold stamping film is excellent in heat resistance and acid corrosion resistance stability.

Description

Technical Field

[0001] The present invention relates to the technical field of hot stamping films, and particularly relates to a hot stamping film and a preparation method thereof. Background Art

[0002] The hot stamping film has a color 3D effect and is widely used in the fields of hot stamping decoration and anti-counterfeiting packaging. It has a good color platinum relief effect, strong anti-counterfeiting performance, excellent wear resistance and hot stamping and slitting properties, meeting the requirements of high-end products such as ID cards, wine packages, cigarette packages, gifts, and cosmetic packages.

[0003] The existing hot stamping films have poor water resistance, and at the same time, the heat resistance and acid corrosion resistance stability of the products are poor. The products are prone to blistering and peeling, affecting the use efficiency of the products. Based on this, the present invention makes further improvements. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a hot stamping film and a preparation method thereof to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems: The present invention provides a preparation method of a hot stamping film, comprising the following steps: Step 1: Using a PET base film as the base layer, coating a release layer on the base layer, arranging a color printing layer on the release layer, arranging a die pressing layer on the color printing layer, and arranging an electroplating layer on the die pressing layer; Step 2: Preparing a hot melt adhesive: Mixing and stirring 30 - 35 parts of ethylene glycol, 20 - 25 parts of polyoxypropylene glycol, 5 - 10 parts of acrylic resin, and 4 - 7 parts of a regulator at a stirring temperature of 120°C and a vacuum degree of -0.1 MPa for 2 h. Then, adding 2 - 5 parts of MDI - 50 isocyanate, 3 - 5 parts of a compounding agent, and 1 - 3 parts of stannous octoate and mixing thoroughly to obtain the hot melt adhesive; Step 3: A hot melt adhesive layer is provided under the PET base film, and the hot melt adhesive layer is formed on the product to be attached through the hot melt adhesive.

[0006] Preferably, the preparation method of the regulator is as follows: S01: Irradiating nano - calcium carbonate in a proton irradiation chamber for 5 - 10 min with an irradiation power of 350 - 400 W. After the irradiation ends, the irradiated nano - calcium carbonate is obtained; S02: Adding 2 - 5 parts of nano - titanium dioxide and 1 - 3 parts of silane coupling agent KH550 to 5 - 8 parts of lanthanum chloride solution, and then adding 2 - 4 parts of stearic acid and stirring thoroughly to obtain the nano - titanium dioxide solution; S03: The irradiated nano-calcium carbonate is immersed in a nano-titanium dioxide solution with a volume of 3-5 times the total volume of the irradiated nano-calcium carbonate, and the solution is stirred and immersed for treatment. After the immersion is completed, the solution is filtered and dried to obtain a regulator.

[0007] Preferably, the mass fraction of the lanthanum chloride solution is 2-5%.

[0008] Preferably, the rotation speed of the stirring immersion treatment is 550-650 r / min, and the stirring time is 20-30 min.

[0009] Preferably, the method of preparing the agent is: S11: heat treating the nano-montmorillonite at 150-160°C for 5-10 min, then heating to 270°C at a rate of 1-3°C / min, keeping the temperature for 5 min, and finally air cooling to room temperature; S12: adding 2-5 parts of silicon carbide powder and 1-3 parts of nano-silica sol to 3-6 parts of yttrium nitrate solution, and then adding 2-4 parts of chitosan solution, stirring thoroughly to obtain silicon carbide liquid; S13: The nano-montmorillonite and silicon carbide liquid of S11 are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water, filtered and dried to obtain a compounding agent.

[0010] Preferably, the mass fraction of the yttrium nitrate solution is 2-5%.

[0011] Preferably, the mass fraction of the chitosan solution is 3-6%.

[0012] Preferably, the ball milling speed of the mixed ball milling treatment is 1000-1500 r / min, and the ball milling is for 2 hours.

[0013] Preferably, the ball milling speed of the mixed ball milling treatment is 1250 r / min, and the ball milling is performed for 2 hours.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The hot stamping film of the present invention uses a PET base film as the base layer, and a release layer is coated on the base layer. Through layer improvement treatment and hot melt adhesive agent, a hot melt adhesive layer is formed on the product to be attached. The hot melt adhesive agent is prepared by mixing ethylene glycol, polypropylene glycol, acrylic resin, a regulator, and a compounding agent. Through the coordination of raw materials, the hot stamping film obtained has excellent heat resistance and acid corrosion resistance stability, and excellent stability in terms of product foaming and peeling. The regulator is irradiated in a proton irradiation chamber with nanometer calcium carbonate first to optimize its activity efficiency, and then improved with nanometer titanium dioxide solution. The obtained regulator enhances the performance stability of the system. At the same time, the compounding agent is heat-treated with montmorillonite, and then mixed with silicon carbide powder, nanometer silica sol, yttrium nitrate solution, and chitosan solution and stirred thoroughly to obtain silicon carbide solution. The silicon carbide solution is coordinated with montmorillonite, so that the coordination effect of the compounding agent and the regulator is further enhanced, and the performance of the product is further improved. Detailed implementation mode

[0015] The following combines specific embodiments to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0016] A preparation method of a hot stamping film in this embodiment includes the following steps: Step 1: Use a PET base film as the base layer, coat a release layer on the base layer, arrange a color printing layer on the release layer, arrange a die pressing layer on the color printing layer, and arrange an electroplating layer on the die pressing layer; Step 2: Prepare a hot melt adhesive agent: Mix 30 - 35 parts of ethylene glycol, 20 - 25 parts of polypropylene glycol, 5 - 10 parts of acrylic resin and 4 - 7 parts of a regulator and stir. The stirring temperature is 120°C, the vacuum degree is -0.1 MPa, and stir for 2 h. Then add 2 - 5 parts of MDI - 50 isocyanate, 3 - 5 parts of a compounding agent, and 1 - 3 parts of stannous octoate and mix thoroughly to obtain a hot melt adhesive agent; Step 3: A hot melt adhesive layer is provided under the PET base film, and a hot melt adhesive layer is formed on the product to be attached through the hot melt adhesive agent.

[0017] The preparation method of the regulator in this embodiment is as follows: S01: Irradiate nanometer calcium carbonate in a proton irradiation chamber for 5 - 10 min with an irradiation power of 350 - 400 W. After irradiation, the irradiated nanometer calcium carbonate is obtained; S02: Add 2 - 5 parts of nanometer titanium dioxide and 1 - 3 parts of silane coupling agent KH550 to 5 - 8 parts of lanthanum chloride solution, and then add 2 - 4 parts of stearic acid and stir thoroughly to obtain nanometer titanium dioxide solution; S03: The irradiated nano-calcium carbonate is immersed in a nano-titanium dioxide solution with a volume of 3-5 times the total volume of the irradiated nano-calcium carbonate, and the solution is stirred and immersed for treatment. After the immersion is completed, the solution is filtered and dried to obtain a regulator.

[0018] The mass fraction of the lanthanum chloride solution of the present embodiment is 2-5%.

[0019] The rotation speed of the stirring immersion treatment in this embodiment is 550-650r / min, and the stirring time is 20-30min.

[0020] The method of the compounding agent of the present embodiment is: S11: heat treating the nano-montmorillonite at 150-160°C for 5-10 min, then heating to 270°C at a rate of 1-3°C / min, keeping the temperature for 5 min, and finally air cooling to room temperature; S12: adding 2-5 parts of silicon carbide powder and 1-3 parts of nano-silica sol to 3-6 parts of yttrium nitrate solution, and then adding 2-4 parts of chitosan solution, stirring thoroughly to obtain silicon carbide liquid; S13: The nano-montmorillonite and silicon carbide liquid of S11 are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water, filtered and dried to obtain a compounding agent.

[0021] The mass fraction of the yttrium nitrate solution in this embodiment is 2-5%.

[0022] The mass fraction of the chitosan solution in this embodiment is 3-6%.

[0023] The ball milling speed of the mixed ball milling treatment in this embodiment is 1000-1500 r / min, and the ball milling is 2 hours.

[0024] The ball milling speed of the mixed ball milling process in this embodiment is 1250 r / min, and the ball milling is performed for 2 hours.

[0025] Example 1. A method for preparing a hot stamping film in this embodiment comprises the following steps: Step 1: Using PET base film as the base layer, coating the base layer with a release layer, arranging a color printing layer on the release layer, arranging a molding layer on the color printing layer, and arranging an electroplating layer on the molding layer; Step 2: Preparation of hot melt adhesive: 30 parts of ethylene glycol, 20 parts of polyoxypropylene glycol, 5 parts of acrylic resin and 4-7 parts of a regulator are mixed and stirred at a stirring temperature of 120°C and a vacuum degree of -0.1 MPa for 2 hours, and then 2 parts of MDI-50 isocyanate, 3 parts of a compounding agent and 1 part of stannous octoate are added and mixed thoroughly to obtain a hot melt adhesive; Step 3: A hot melt adhesive layer is provided at the lower part of the PET base film, which is attached to the product to be attached through a hot melt adhesive to form a hot melt adhesive layer.

[0026] The preparation method of the regulator in this embodiment is as follows: S01: Irradiate nano calcium carbonate in a proton irradiation chamber for 5 min with an irradiation power of 350 W. After the irradiation ends, the irradiated nano calcium carbonate is obtained; S02: Add 2 parts of nano titanium dioxide and 1 part of silane coupling agent KH550 to 5 parts of lanthanum chloride solution, and then add 2 parts of stearic acid. Stir well to obtain nano titanium dioxide solution; S03: Immerse the irradiated nano calcium carbonate in nano titanium dioxide solution which is 3 times the total amount of the irradiated nano calcium carbonate, and stir for immersion treatment. After the immersion ends, filter by suction and dry to obtain the regulator.

[0027] The mass fraction of the lanthanum chloride solution in this embodiment is 2%.

[0028] The rotation speed of the stirring immersion treatment in this embodiment is 550 r / min, and the stirring time is 20 min.

[0029] The method for compounding agents in this embodiment is as follows: S11: Heat-treat nano montmorillonite at 150 °C for 5 min, then heat it to 270 °C at a rate of 1 °C / min, keep it warm for 5 min, and finally air-cool it to room temperature; S12: Add 2 parts of silicon carbide powder and 1 part of nano silica sol to 3 parts of yttrium nitrate solution, and then add 2 parts of chitosan solution. Stir well to obtain silicon carbide solution; S13: Mix the nano montmorillonite obtained in S11 and the silicon carbide solution according to a weight ratio of 5:3 and perform ball milling treatment. After the ball milling ends, wash with water, filter by suction and dry to obtain the compounding agent.

[0030] The mass fraction of the yttrium nitrate solution in this embodiment is 2%.

[0031] The mass fraction of the chitosan solution in this embodiment is 3%.

[0032] The ball milling speed of the mixing ball milling treatment in this embodiment is 1000 r / min, and the ball milling time is 2 h.

[0033] Example 2. A preparation method of a hot stamping film in this embodiment includes the following steps: Step 1: Use a PET base film as the base layer, coat a release layer on the base layer, arrange a color printing layer on the release layer, arrange a die pressing layer on the color printing layer, and arrange an electroplating layer on the die pressing layer; Step 2: Prepare a hot melt adhesive: Mix 35 parts of ethylene glycol, 25 parts of polypropylene glycol, 10 parts of acrylic resin and 7 parts of regulator, stir at 120°C under a vacuum of -0.1 MPa for 2 hours. Then add 5 parts of MDI-50 isocyanate, 5 parts of compounding agent and 3 parts of stannous octoate and mix well to obtain a hot melt adhesive; Step 3: There is a hot melt adhesive layer under the PET base film, which forms a hot melt adhesive layer by attaching to the product to be attached through the hot melt adhesive.

[0034] The preparation method of the regulator in this example is as follows: S01: Irradiate nano calcium carbonate in a proton irradiation chamber for 10 minutes at an irradiation power of 400 W. After irradiation, obtain irradiated nano calcium carbonate; S02: Add 5 parts of nano titanium dioxide and 3 parts of silane coupling agent KH550 to 8 parts of lanthanum chloride solution, and then add 4 parts of stearic acid and stir well to obtain nano titanium dioxide solution; S03: Immerse the irradiated nano calcium carbonate in nano titanium dioxide solution which is 5 times the total amount of irradiated nano calcium carbonate, stir and immerse. After immersion, filter by suction and dry to obtain the regulator.

[0035] The mass fraction of the lanthanum chloride solution in this example is 5%.

[0036] The rotation speed of the stirring and immersion treatment in this example is 650 r / min, and the stirring time is 30 minutes.

[0037] The method of the compounding agent in this example is as follows: S11: Heat-treat nano montmorillonite at 160°C for 10 minutes, then heat it to 270°C at a rate of 3°C / min, keep it warm for 5 minutes, and finally air-cool to room temperature; S12: Add 5 parts of silicon carbide powder and 3 parts of nano silica sol to 6 parts of yttrium nitrate solution, and then add 4 parts of chitosan solution, stir well to obtain silicon carbide solution; S13: Mix the nano montmorillonite obtained in S11 and the silicon carbide solution according to a weight ratio of 5:3, perform ball milling treatment. After ball milling, wash with water, filter by suction and dry to obtain the compounding agent.

[0038] The mass fraction of the yttrium nitrate solution in this example is 5%.

[0039] The mass fraction of the chitosan solution in this example is 6%.

[0040] The ball milling speed of the mixing and ball milling treatment in this example is 1500 r / min, and ball milling is carried out for 2 hours.

[0041] Example 3. A method for preparing a hot stamping film in this example includes the following steps: Step 1: Use a PET base film as the substrate layer, coat a release layer on the substrate layer, arrange a color printing layer on the release layer, arrange a molding layer on the color printing layer, and arrange an electroplating layer on the molding layer; Step 2: Prepare a hot melt adhesive: Blend and stir 32.5 parts of ethylene glycol, 22.5 parts of polypropylene glycol, 7.5 parts of acrylic resin, and 5.5 parts of a regulator. The stirring temperature is 120 °C, the vacuum degree is -0.1 MPa, and stir for 2 h. Then add 3.5 parts of MDI-50 isocyanate, 4 parts of a compounding agent, and 2 parts of stannous octoate and blend thoroughly to obtain the hot melt adhesive; Step 3: There is a hot melt adhesive layer under the PET base film, and a hot melt adhesive layer is formed by attaching to the product to be attached through the hot melt adhesive.

[0042] The preparation method of the regulator in this embodiment is as follows: S01: Irradiate nano calcium carbonate in a proton irradiation chamber for 7.5 min with an irradiation power of 370 W. After irradiation, obtain irradiated nano calcium carbonate; S02: Add 3.5 parts of nano titanium dioxide and 2 parts of silane coupling agent KH550 to 6.5 parts of lanthanum chloride solution, and then add 3 parts of stearic acid and stir thoroughly to obtain nano titanium dioxide solution; S03: Immerse the irradiated nano calcium carbonate in nano titanium dioxide solution with a volume 4 times that of the total amount of irradiated nano calcium carbonate and stir for immersion treatment. After immersion, filter by suction and dry to obtain the regulator.

[0043] The mass fraction of the lanthanum chloride solution in this embodiment is 3.5%.

[0044] The rotation speed of the stirring immersion treatment in this embodiment is 600 r / min, and the stirring time is 25 min.

[0045] The method of the compounding agent in this embodiment is as follows: S11: Heat-treat nano montmorillonite at 155 °C for 7.5 min, then heat it to 270 °C at a rate of 2 °C / min, keep it warm for 5 min, and finally air-cool to room temperature; S12: Add 3.5 parts of silicon carbide powder and 2 parts of nano silica sol to 4.5 parts of yttrium nitrate solution, and then add it to 3 parts of chitosan solution and stir thoroughly to obtain silicon carbide solution; S13: Mix the nano montmorillonite in S11 and the silicon carbide solution according to a weight ratio of 5:3 and perform ball milling treatment. After ball milling, wash with water, filter by suction, and dry to obtain the compounding agent.

[0046] The mass fraction of the yttrium nitrate solution in this embodiment is 3.5%.

[0047] The mass fraction of the chitosan solution in this embodiment is 4.5%.

[0048] In this embodiment, the ball milling speed for the hybrid ball milling treatment is 1250 r / min, and the ball milling is carried out for 2 h.

[0049] Comparative Example 1. It is different from Example 3 in that no regulator is added.

[0050] Comparative Example 2. It is different from Example 3 in that nano-titanium dioxide solution is not added during the preparation of the regulator.

[0051] Comparative Example 3. It is different from Example 3 in that nano-titanium dioxide is not added to the nano-titanium dioxide solution.

[0052] Comparative Example 4. It is different from Example 3 in that no compounding agent is added.

[0053] Comparative Example 5. It is different from Example 3 in that silicon carbide solution is not added during the preparation of the compounding agent.

[0054] The product performances of Examples 1 - 3 and Comparative Examples 1 - 5 were tested. They were immersed in water for 24 h to test the water resistance stability, placed at 65 °C for 24 h to test the heat resistance stability, and placed under the condition of 2% hydrochloric acid mist for 24 h to test the acid mist resistance stability. The tests are as follows:

[0055] It can be seen from Comparative Examples 1 - 5 and Example 3 that the product of Example 3 has excellent water resistance, heat resistance and acid mist resistance performances. At the same time, the product is adjusted with a regulator and a compounding agent, and the product performance effect is remarkable. Also, when nano-titanium dioxide solution is not added during the preparation of the regulator, nano-titanium dioxide is not added to the nano-titanium dioxide solution, and silicon carbide solution is not added during the preparation of the compounding agent, the performance of the product shows a deteriorating trend. Only the product raw materials obtained by the method of the present invention have the most remarkable product performance effect.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0057] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a hot stamping film, characterized in that: The following steps are involved: Step 1: Using PET base film as the base layer, coating the base layer with a release layer, arranging a color printing layer on the release layer, arranging a molding layer on the color printing layer, and arranging an electroplating layer on the molding layer; Step 2: Preparation of hot melt adhesive: 30-35 parts of ethylene glycol, 20-25 parts of polyoxypropylene glycol, 5-10 parts of acrylic resin and 4-7 parts of a regulator are mixed and stirred at a stirring temperature of 120°C and a vacuum degree of -0.1 MPa for 2 hours, and then 2-5 parts of MDI-50 isocyanate, 3-5 parts of a compensating agent and 1-3 parts of stannous octoate are added and mixed sufficiently to obtain a hot melt adhesive; Step 3: A hot melt adhesive layer is provided at the lower part of the PET base film, which is attached to the product to be attached through a hot melt adhesive to form a hot melt adhesive layer.

2. The method for preparing a hot stamping film according to claim 1, characterized in that: The preparation method of the regulator is: S01: irradiating the nano-calcium carbonate in a proton irradiation box for 5-10 minutes at an irradiation power of 350-400W, and obtaining irradiated nano-calcium carbonate after the irradiation is completed; S02: adding 2-5 parts of nano titanium dioxide and 1-3 parts of silane coupling agent KH550 to 5-8 parts of lanthanum chloride solution, and then adding 2-4 parts of stearic acid, stirring thoroughly to obtain nano titanium dioxide liquid; S03: The irradiated nano-calcium carbonate is immersed in a nano-titanium dioxide solution with a volume of 3-5 times the total volume of the irradiated nano-calcium carbonate, and the solution is stirred and immersed for treatment. After the immersion is completed, the solution is filtered and dried to obtain a regulator.

3. The method for preparing a hot stamping film according to claim 2, characterized in that: The mass fraction of the lanthanum chloride solution is 2-5%.

4. The method for preparing a hot stamping film according to claim 2, characterized in that: The rotation speed of the stirring immersion treatment is 550-650r / min, and the stirring time is 20-30min.

5. The method for preparing a hot stamping film according to claim 1, characterized in that: The method of the compounding agent is: S11: heat treating the nano-montmorillonite at 150-160°C for 5-10 min, then heating to 270°C at a rate of 1-3°C / min, keeping the temperature for 5 min, and finally air cooling to room temperature; S12: adding 2-5 parts of silicon carbide powder and 1-3 parts of nano-silica sol to 3-6 parts of yttrium nitrate solution, and then adding 2-4 parts of chitosan solution, stirring thoroughly to obtain silicon carbide liquid; S13: The nano-montmorillonite and silicon carbide liquid of S11 are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water, filtered and dried to obtain a compounding agent.

6. The method for preparing a hot stamping film according to claim 5, characterized in that: The mass fraction of the yttrium nitrate solution is 2-5%.

7. The method for preparing a hot stamping film according to claim 5, characterized in that: The mass fraction of the chitosan solution is 3-6%.

8. The method for preparing a hot stamping film according to claim 5, characterized in that: The ball milling speed of the mixed ball milling treatment is 1000-1500 r / min, and the ball milling is performed for 2 hours.

9. The method for preparing a hot stamping film according to claim 8, characterized in that: The ball milling speed of the mixed ball milling treatment is 1250 r / min, and the ball milling is performed for 2 hours.

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