CN112522706A - Precise etching hidden type anti-counterfeiting process - Google Patents
Precise etching hidden type anti-counterfeiting process Download PDFInfo
- Publication number
- CN112522706A CN112522706A CN202011356188.5A CN202011356188A CN112522706A CN 112522706 A CN112522706 A CN 112522706A CN 202011356188 A CN202011356188 A CN 202011356188A CN 112522706 A CN112522706 A CN 112522706A
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- CN
- China
- Prior art keywords
- controlling
- aluminum layer
- coating
- reaction tank
- etching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
Abstract
The invention relates to a precise etching hidden anti-counterfeiting process which is characterized by comprising the following steps: 1) coating a mould pressing coating on the PET base film; 2) impressing holographic laser on the surface of the mould pressing coating to form a holographic laser layer; 3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the non-etching part of the aluminum plating surface; 5) preparing a supersaturated calcium oxide solution in a reaction tank; 6) performing aluminum layer precision etching, controlling the temperature of the reaction tank at 50-60 deg.C, the speed at 60-70m/min, controlling the residence time of the film belt in the reaction tank at 10-15 s, setting the temperature of the oven at 80 deg.C, and oven drying to obtain the final product with the aluminum layer thickness of the windowing part
Description
Technical Field
The invention particularly relates to a precise etching hidden anti-counterfeiting process.
Background
The new development trend of anti-counterfeiting packages is to break through the limitation of the original holographic anti-counterfeiting, the packaging technology and the anti-counterfeiting technology are organically combined, the anti-counterfeiting is integrated in the packages, the anti-counterfeiting packages required by enterprises do not simply stick or print the anti-counterfeiting technology on the packages, but more advocate 'simple packaging and high-grade anti-counterfeiting', which is the way for the enterprises to develop, the cost is reduced, the probability of counterfeiting is greatly reduced, and the counterfeiting sale is almost impossible. The holographic hollow-out technology is an anti-counterfeiting packaging technology which is started in the present year, partial hollow-out treatment of an aluminized holographic layer is realized by an alkaline washing process, the main component of alkaline liquid is sodium hydroxide solution, the alkaline liquid is commonly called fire alkaline water, the aluminized layer is subjected to chemical reaction, and the aluminized layer of a corresponding aluminized film is removed through an aluminizing tank device to form a local hollow-out effect, so that the anti-counterfeiting packaging technology has good decorative and anti-counterfeiting performances.
Disclosure of Invention
The invention aims to provide a precise etching hidden anti-counterfeiting process, which utilizes a low-concentration calcium oxide aqueous solution to etch an aluminum plating layer in a short time to form a hidden hollow effect which can be seen under strong light, thereby improving the anti-counterfeiting performance.
The invention is realized by the following technical scheme:
namely, the precise etching hidden anti-counterfeiting process is characterized by comprising the following steps:
1) coating a mould pressing coating on the PET base film;
2) impressing holographic laser on the surface of the mould pressing coating to form a holographic laser layer;
3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the non-etching part of the aluminum plating surface;
5) preparing a supersaturated calcium oxide solution in a reaction tank;
6) the aluminum layer is precisely etched, and the aluminum layer is etched,controlling the temperature of the reaction tank at 50-60 deg.C, the speed at 60-70m/min, controlling the residence time of the membrane belt in the reaction tank at 10-15 s, setting the temperature of the oven at 80 deg.C, and oven drying to obtain the final product with the thickness of the aluminum layer at the windowing part
The pattern can not be seen when the lamp is looked down under the ordinary light, and the projecting lamp is arranged on the back side, so that the obvious yin-yang color pattern can be observed when the lamp is looked down.
The traditional aluminum washing process needs to print protective paint on the aluminum layer, then the aluminum is washed in sodium hydroxide or dilute sulfuric acid, and the aluminum layer at the part without printing the coating can be completely washed away.
The die pressing coating and the protective paint used in the process steps 1) to 4) of the invention are the same as those used in the traditional aluminum washing process.
The thickness of the aluminum layer of the film of the invention is only
The reaction speed of the aluminum and the sodium hydroxide or the dilute sulfuric acid is extremely high, so that the aluminum without printing positions can be completely corroded to leave open windows. The invention directly uses the calcium oxide aqueous solution with lower alkalinity as the effective reaction substance of the reaction tank, the film of the printing protective coating runs in the reaction tank through the guide roller, because the corrosivity of calcium oxide is weaker, under the condition of controlling the time, the aluminum layer of the windowing part can not be completely corroded by the calcium oxide aqueous solution, and is only partially corroded, thereby thinning the aluminum layer of the windowing part, the aluminum layer of the windowing part of the manufactured product is not completely corroded, but is partially corroded and thinned, the manufactured product can not be windowed, and the invisible anti-counterfeiting pattern can be presented only by strong light irradiation.
The reaction principle of the invention is that the metal aluminum can react with hydroxyl under alkaline condition, and the reaction process is as follows:
Al+2NaOH+6H2O＝2Na[Al(OH)4]+3H2↑
in the above reaction, since 2Na [ Al (OH)4] is a readily soluble substance, it is difficult to control the reaction rate in the actual process. The core point of the invention is that the reaction speed of the aluminum layer and hydroxyl is controlled to achieve the effect that the aluminum layer is partially corroded in the thickness layer within the specified time, the corroded aluminum layer is not completely corroded but partially corroded, the corroded part still has the aluminum layer but the aluminum layer becomes thinner, thereby realizing the hidden anti-counterfeiting function.
The specific reaction chemical equation is as follows:
1.CaO+H2O＝＝＝Ca(OH)2
reaction 1 due to the substance Ca (OH)2Slightly soluble in water, and has solubility of only 129g/100mL at 40 deg.C, so that excess CaO can be piled up in the water-building pool to ensure Ca (OH) in the alkali pool2Is always in a saturated state, and the stability is greatly increased.
2.Al+2H2O+Ca(OH)2＝Ca(AlO2)2+3H2(gas)
Due to Ca (AlO)2)2The reaction speed of 2 is relatively slow because of difficult dissolution, and the aluminum layer can be ensured to be partially corroded by controlling the retention time of the aluminum plating film in an alkaline water bath to control the corrosion speed of the aluminum layer.
The film of the invention enters the oven quickly after reacting in the reaction tank, the calcium oxide solution remained on the film is dried quickly, the reaction stops quickly, and the remained calcium oxide solution is effectively prevented from continuously reacting with aluminum.
The invention has the advantages of stable and reliable process, and the product prepared by the process has good anti-counterfeiting performance.
Detailed Description
Example 1
1) Coating a mould pressing coating on the PET base film;
2) impressing holographic laser on the surface of the mould pressing coating to form encrypted special laser;
3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the aluminum plating surface according to the design requirement;
5) preparing a supersaturated calcium oxide solution;
6) performing aluminum layer precision etching, controlling the temperature of the reaction tank at 50 ℃, the speed of the vehicle at 60m/min, controlling the residence time of the film belt in the reaction tank at 15.0 seconds, setting the temperature of an oven at 80 ℃, and drying to obtain a finished product, wherein the thickness of the aluminum layer at the windowing part of the finished product is
The projection lamp can observe obvious yin-yang color patterns when looking at the projection lamp.
Example 2
1) Coating a mould pressing coating on the PET base film;
2) impressing holographic laser on the surface of the mould pressing coating to form encrypted special laser;
3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the aluminum plating surface according to the design requirement;
5) preparing a supersaturated calcium oxide solution;
6) performing aluminum layer precision etching, controlling the temperature of the reaction tank at 60 ℃, controlling the speed at 70m/min, controlling the residence time of the film belt in the reaction tank at 12.9 seconds, setting the temperature of an oven at 80 ℃, and drying to obtain a finished product, wherein the thickness of the aluminum layer at the windowing part of the finished product is
The projection lamp can observe obvious yin-yang color patterns when looking at the projection lamp.
Example 3
1) Coating a mould pressing coating on the PET base film;
2) impressing holographic laser on the surface of the mould pressing coating to form encrypted special laser;
3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the aluminum plating surface according to the design requirement;
5) preparing a supersaturated calcium oxide solution;
6) performing aluminum layer precision etching, controlling the temperature of the reaction tank at 50 ℃, the speed of the vehicle at 65m/min, controlling the residence time of the film belt in the reaction tank at 13.8 seconds, setting the temperature of an oven at 80 ℃, and drying to obtain a finished product, wherein the thickness of the aluminum layer at the windowing part of the finished product is
The projection lamp can observe obvious yin-yang color patterns when looking at the projection lamp.
Claims (1)
1. A precise etching hidden anti-counterfeiting process is characterized by comprising the following steps:
1) coating a mould pressing coating on the PET base film;
2) impressing holographic laser on the surface of the mould pressing coating to form a holographic laser layer;
3) vacuum aluminizing, controlling the thickness of the whole aluminum layer
4) Printing a protective coating on the non-etching part of the aluminum plating surface;
5) preparing a supersaturated calcium oxide solution in a reaction tank;
6) performing aluminum layer precision etching, controlling the temperature of the reaction tank at 50-60 deg.C, the speed at 60-70m/min, controlling the residence time of the film belt in the reaction tank at 10-15 s, setting the temperature of the oven at 80 deg.C, and oven drying to obtain the final product with the aluminum layer thickness of the windowing part
The pattern can not be seen when the lamp is looked down under the ordinary light, and the projecting lamp is arranged on the back side, so that the obvious yin-yang color pattern can be observed when the lamp is looked down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356188.5A CN112522706A (en) | 2020-11-27 | 2020-11-27 | Precise etching hidden type anti-counterfeiting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356188.5A CN112522706A (en) | 2020-11-27 | 2020-11-27 | Precise etching hidden type anti-counterfeiting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112522706A true CN112522706A (en) | 2021-03-19 |
Family
ID=74994222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011356188.5A Pending CN112522706A (en) | 2020-11-27 | 2020-11-27 | Precise etching hidden type anti-counterfeiting process |
Country Status (1)
| Country | Link |
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| CN (1) | CN112522706A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652945A (en) * | 2002-04-26 | 2005-08-10 | 德国捷德有限公司 | Security element and method for producing the same |
| CN102463757A (en) * | 2010-11-12 | 2012-05-23 | 武汉华工图像技术开发有限公司 | Preparation method of holographic transfer film for replacing holographic gold stamping |
| CN103204012A (en) * | 2013-02-21 | 2013-07-17 | 上海宁升材料科技有限公司 | Method for preparing coating aluminum with invisible anti-counterfeiting mark |
| US20180223480A1 (en) * | 2016-04-28 | 2018-08-09 | South China University Of Technology | Water-induced anti-counterfeiting paper and preparation method thereof |
| WO2019189773A1 (en) * | 2018-03-30 | 2019-10-03 | 日本パーカライジング株式会社 | Substrate having surface made entirely or at least partially of metal material wherein surface of said metal material has holes, and substrate-resin cured product composite containing said substrate and resin cured product |
-
2020
- 2020-11-27 CN CN202011356188.5A patent/CN112522706A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1652945A (en) * | 2002-04-26 | 2005-08-10 | 德国捷德有限公司 | Security element and method for producing the same |
| CN102463757A (en) * | 2010-11-12 | 2012-05-23 | 武汉华工图像技术开发有限公司 | Preparation method of holographic transfer film for replacing holographic gold stamping |
| CN103204012A (en) * | 2013-02-21 | 2013-07-17 | 上海宁升材料科技有限公司 | Method for preparing coating aluminum with invisible anti-counterfeiting mark |
| US20180223480A1 (en) * | 2016-04-28 | 2018-08-09 | South China University Of Technology | Water-induced anti-counterfeiting paper and preparation method thereof |
| WO2019189773A1 (en) * | 2018-03-30 | 2019-10-03 | 日本パーカライジング株式会社 | Substrate having surface made entirely or at least partially of metal material wherein surface of said metal material has holes, and substrate-resin cured product composite containing said substrate and resin cured product |
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Application publication date: 20210319 |
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| RJ01 | Rejection of invention patent application after publication |