CN114393939B

CN114393939B - Film-free gold stamping method

Info

Publication number: CN114393939B
Application number: CN202111639613.6A
Authority: CN
Inventors: 莫正戎; 胡爱军; 崔凤; 王翔; 王海文
Original assignee: Zhejiang Minong Century Group Co ltd
Current assignee: Zhejiang Minong Century Group Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2023-06-27
Anticipated expiration: 2041-12-30
Also published as: CN114393939A

Abstract

The invention belongs to the technical field of gold stamping, and discloses a film-free gold stamping method which comprises the following steps: step 1: generating an image with a micro-nano structure by adopting a photoetching technology to form an embossment and the like; step 2: making the optical original edition into a metal plate by an electroforming technology, and performing anti-adhesion treatment on the surface of the metal plate; step 3: manufacturing a required gold-stamped field pattern into a film, and then printing the field pattern with thermoplastic resin ink by using a high-mesh silk-screen plate; step 4: and (5) low-temperature hot-pressing silk screen printing the field pattern to display an effect graph. The invention can realize transparent images by adopting a film-free gold stamping method, can also display aluminized images on the gold and silver card base paper, can add any color in the thermoplastic resin ink, and displays patterns and images with different colors by low-temperature hot pressing. By using the film-free gold stamping method, various processes of one procedure can be realized.

Description

Film-free gold stamping method

Technical Field

The invention belongs to the technical field of gold stamping, and particularly relates to a film-free gold stamping method.

Background

The current gold stamping technology mainly realizes gold stamping effect by gold stamping film transfer, the gold stamping film plating layer is divided into an aluminized film and a plating medium (ZnS) film, and the pattern structure is mainly represented by the color of the gold stamping film and an information layer on the film. The transfer of the gold stamping film is not needed no matter the hot stamping transfer or the cold stamping transfer, the preparation process of the gold stamping film is complex, and the color and the transfer performance are difficult to control aiming at different pattern sizes.

Disclosure of Invention

The invention aims to provide a film-free gold stamping method to solve the technical problems that the existing gold stamping technology is complex in gold stamping film preparation technology, and the color and transfer performance are difficult to control aiming at different patterns.

In order to solve the technical problems, the specific technical scheme of the film-free gold stamping method is as follows:

a film-free gold stamping method comprises the following steps:

step 1: generating an image with a micro-nano structure by adopting a photoetching technology to form an embossment and the like;

step 2: making the optical original edition into a metal plate by an electroforming technology, and performing anti-adhesion treatment on the surface of the metal plate;

step 3: manufacturing a required gold-stamped field pattern into a film, and then printing the field pattern with thermoplastic resin ink by using a high-mesh silk-screen plate;

step 4: and (5) low-temperature hot-pressing silk screen printing the field pattern to display an effect graph.

Further, the step 1 comprises the following specific steps:

step 1.1: photoetching a gold stamping pattern into an image with a micro-nano structure, generating different light sensation and texture by light interference by utilizing the difference of the micro-structures, and expressing the visual characteristics of the graphic image by adopting the micro-structures;

step 1.2: immersing silver in the photoetching plate, and electroforming to copy a nickel plate;

further, the step 2 comprises the following specific steps:

step 2.1: and generating CF2 functional groups by discharging the mixed gas of CF4/H2, depositing PTFE (polytetrafluoroethylene) film on the nickel plate through plasma polymerization, and forming a Teflon film on the surface to form an anti-adhesion surface.

Step 2.2: mechanically processing the nickel plate subjected to the anti-sticking treatment into a gold stamping plate;

further, the step 3 comprises the following specific steps:

step 3.1: the method comprises the steps of manufacturing a required gold stamping real-time pattern into a film;

step 3.2: the thermoplastic resin ink was screen printed with a 510 mesh screen to give a hot-pressed land pattern and UV dried. And (3) controlling the leveling property and the curing degree of the printing ink and controlling the UV intensity and the printing speed under the condition of a 510-mesh screen, so that the surface of the printing ink is semi-cured and is not sticky.

Further, in the step 4, the drying degree of the ink is controlled, so that when the gilding plate is heated to the vitrification temperature of the ink, the micro-nano structure of the plate is copied on the surface of the ink, and an optical image is formed.

Further, the micro-nano structure depth of the step 1.1 is 5um-10um.

Further, the film thickness of the step 2.1 is 2um-3um.

Further, the printing speed in the step 3.2 is 35 m/min, and 1 10KW medium-pressure mercury lamp is used for curing.

Further, the thermoplastic resin ink composition of step 3.2 is: modified polyurethane acrylate 70%; 5-10% of TMPTA monomer; 5-8% of IBOA monomer; 3-6% of diphenyl ketone derivative; 1-2% of TPO photoinitiator; 6% of active amine; 1-2% of defoaming leveling agent;

further, the ink has a glass transition temperature of 50-60 degrees.

The film-free gold stamping method has the following advantages: the invention can realize transparent images by adopting a film-free gold stamping method, can also display aluminized images on the gold and silver card base paper, can add any color in the thermoplastic resin ink, and displays patterns and images with different colors by low-temperature hot pressing. By using the film-free gold stamping method, various processes of one procedure can be realized. In the actual product production, a partial silk-screen local glazing process and a gold stamping process can be combined. After the one-step silk screen printing process, the local pattern realizes the silk screen printing effect, and the pattern needing to be gilded can be subjected to low-temperature hot pressing to present images such as holograms, embossments or lenses by using a precise gilded plate with a microstructure.

Drawings

Fig. 1 is a flow chart of a film-free gold stamping method of the invention.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the present invention relates to a film-free gold stamping method, which is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, a film-free gold stamping method comprises the following specific steps:

step 1: and generating an image with a micro-nano structure by adopting a photoetching technology to form an embossment and the like.

Step 1.1: photoetching a gold stamping pattern into an image with a micro-nano structure, such as relief, hologram or lens, wherein the depth of the micro-nano structure is 5-10 um; different light sensation and texture are generated by light interference by utilizing different microstructures, and the microstructures are adopted to express the visual characteristics of the graphic images;

step 2: the optical original edition is made into a metal plate by an electroforming technology, and the surface of the metal plate is subjected to anti-adhesion treatment, so that the phenomenon that the anti-adhesion of the resin ink in the repeated hot pressing process of the oily ink influences the definition of patterns is prevented.

Step 2.1: and generating CF2 functional groups by discharging the mixed gas of CF4/H2, depositing a PTFE (polytetrafluoroethylene) film on the nickel plate through plasma polymerization, wherein the thickness of the film is 2um-3um, and forming a Teflon film on the surface to form an anti-adhesion surface. The nickel plate treated by the anti-blocking treatment has a low energy surface so that the plate does not adhere to the ink when separated after low temperature hot pressing.

step 3: the required gold-stamped field pattern is manufactured into a film, and then the thermoplastic resin ink is printed with the field pattern by using a high-mesh silk screen plate.

step 3.2: the thermoplastic resin ink was screen printed with a 510 mesh screen to give a hot-pressed land pattern and UV dried. And (3) controlling the leveling property and the curing degree of the printing ink, controlling the UV intensity, controlling the printing speed to be 35 m/min under the condition of a 510-mesh screen, and curing by adopting 1 10KW medium-pressure mercury lamp to enable the surface of the printing ink to be semi-cured and not sticky. The thermoplastic resin ink composition is: modified polyurethane acrylate 70%; 5-10% of TMPTA monomer; 5-8% of IBOA monomer; 3-6% of diphenyl ketone derivative; 1-2% of TPO photoinitiator; 6% of active amine; 1-2% of defoaming leveling agent;

When the gilding plate is heated to the vitrification temperature of the printing ink by controlling the dryness of the printing ink, when the gilding plate reaches 50-60 ℃, the micro-nano structure of the plate is copied on the surface of the printing ink to form an optical image.

The invention makes the required gold stamping real pattern into film, then prints the thermoplastic resin ink with high-mesh silk screen plate to form the real pattern, after UV drying, uses the precise gold stamping plate with microstructure to heat and press at low temperature, the surface reaches glass transition temperature, the microstructure on the plate is duplicated on the ink surface, and the patterns with different light sensation and texture are obtained. Transparent images can be realized by adopting a film-free gold stamping method, aluminized images can be presented on the gold and silver card base paper, any color can be added in the thermoplastic resin ink, and patterns and images with different colors can be presented through low-temperature hot pressing.

In addition, by using a film-free gold stamping method, various processes of one procedure can be realized. In the actual product production, a partial silk-screen local glazing process and a gold stamping process can be combined. After the one-step silk screen printing process, the local pattern realizes the silk screen printing effect, and the pattern needing to be gilded can be subjected to low-temperature hot pressing to present images such as holograms, embossments or lenses by using a precise gilded plate with a microstructure.

It will be understood that the invention has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The film-free gold stamping method is characterized by comprising the following steps of:

step 1: generating an image forming relief with a micro-nano structure by adopting a photoetching technology;

step 2.1: generating CF2 functional groups by discharging the mixed gas of CF4/H2, depositing PTFE (polytetrafluoroethylene) film on a nickel plate through plasma polymerization, forming a Teflon film on the surface, and forming an anti-blocking surface;

step 3: the pattern to be gilded is made into film, and then the pattern is printed by the thermoplastic resin ink through a silk-screen plate with high meshes;

step 3.1: manufacturing a pattern to be gilded into a film;

step 3.2: printing a hot-pressing pattern on thermoplastic resin ink by using a 510-mesh screen, and drying by UV; controlling the leveling property and the curing degree of the printing ink and controlling the UV intensity and the printing speed under the 510-mesh screen to enable the surface of the printing ink to be semi-cured and not sticky;

step 4: low temperature hot-pressing silk-screen patterns to present effect patterns;

and 4, controlling the dryness of the ink, and copying the micro-nano structure of the plate on the surface of the ink to form an optical image when the gold stamping plate is heated to the vitrification temperature of the ink.

2. The film-less stamping method of claim 1, wherein the micro-nano structure depth of step 1.1 is 5um-10um.

3. The film-less stamping method as claimed in claim 1, wherein the film thickness of the step 2.1 is 2um-3um.

4. The film-less bronzing process of claim 1, wherein the printing speed of step 3.2 is 35 m/min, and 1 10KW medium-pressure mercury lamp is used for curing.

5. The film-less stamping method as recited in claim 1, wherein the thermoplastic resin ink composition of step 3.2 is: modified polyurethane acrylate 70%; 5-10% of TMPTA monomer; 5-8% of IBOA monomer; 3-6% of diphenyl ketone derivative; 1-2% of TPO photoinitiator; 6% of active amine; 1-2% of defoaming leveling agent.

6. The film-less stamping method as claimed in claim 1, wherein the ink glass transition temperature is 50-60 degrees.