CN218399945U

CN218399945U - Colored electrification aluminium thermoprint structure

Info

Publication number: CN218399945U
Application number: CN202220835038.0U
Authority: CN
Inventors: 易元锋
Original assignee: Guizhou Jinjia New Packaging Material Co ltd
Current assignee: Guizhou Jinjia New Packaging Material Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-01-31
Anticipated expiration: 2032-04-12

Abstract

The utility model discloses a colored electrochemical aluminium thermoprint structure, include from the bottom up paper layer (1), local glue layer (2), local aluminize layer (3), local colored picture and text layer (4) and local radium-shine impression layer (5). The thermoprinting structure of the utility model has better smoothness of the color pictures and texts; the laser effect is on the front side of the printed graph and text, and the laser effect is stronger; the area of the hot stamping structure can be enlarged by 2-3 times, and the design effect is improved.

Description

Colored electrification aluminium thermoprint structure

Technical Field

The utility model relates to a colored electrochemical aluminium thermoprint structure belongs to colored electrochemical aluminium thermoprint technical field.

Background

The laser aluminum foil gold stamping processing finishing is a common post-printing processing technology, a process of firstly stamping and then printing on high-grade packaging printed products is a new idea, the performance of printing paper is locally changed, and then UV transparent ink printing is matched, so that the effect of drawing dragon dots is often achieved, for example, a Guizhou Zhongyan frosted Huangguoshu hard bag product, the main yellow tree waterfall on the front side is printed on the gold stamping surface, so that the main body pattern and the surrounding characters have strong contrast, and the bottom penetrating refraction effect of laser silver also enables the soaring waterfall to be more real. The technology of firstly gold stamping and then printing of the laser alumite requires that a designed gold stamping plate with image-text outlines is used for processing and hot stamping pattern plane outlines on a gold stamping machine, and then a multicolor offset press is used for color printing, so that the effect that the bottom of a pattern is a laser effect can be obtained.

The prior art has the following limitations: the original image-text layout inevitably has bubbles and reverse drawing, which causes the unevenness of the color image-text; the laser effect of the original image and text is that the laser effect can be displayed only by increasing the transparency of the ink layer at the bottom of the color image and text ink layer, the color gorgeous degree during printing is inevitably influenced, and the laser effect is weaker; the original structure can realize that the area of firstly stamping and then printing is smaller.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: provides a color alumite hot stamping structure to solve the problems existing in the prior art.

The utility model discloses the technical scheme who takes does: the utility model provides a colored electrochemical aluminium thermoprint structure, includes from the bottom up paper layer, local glue layer, local aluminize layer, local colored picture and text layer and the radium-shine impression layer of part.

The local glue part of the local glue layer, the local aluminum plating part of the local aluminum plating layer, the local color image-text part of the local color image-text layer and the local laser stamping part of the local laser stamping layer are opposite.

The utility model has the advantages that: compared with the prior art, the utility model discloses the new printing structure technology who obtains has following advantage: 1) The original image-text layout inevitably has bubbles and reverse tension, and the smoothness of the color image-text is better by adopting the hot stamping structure; 2) The laser effect of the original image and text is that the laser effect can be displayed only by increasing the transparency of the ink layer at the bottom of the color image ink layer, the colorful degree during printing is inevitably influenced, and the laser effect is weaker; the laser effect of the hot stamping structure of the utility model is on the front side of the printed pictures and texts, and the laser effect is stronger; 3) The original structure can realize that the area of the stamp after the hot stamping is smaller, the area of the structure of the utility model can be enlarged by 2-3 times, and the design effect is increased; 4) The local hot stamping mainly can locally highlight key points on the design, increase the unique effect of a designed product and reduce the cost (compared with the integral laser effect).

Drawings

Fig. 1 is a structure diagram of a cross section of a color aluminum foil, wherein the structure diagram comprises a base film layer 1, a separation layer 2, a 3, a laser stamping layer 4, a printing image-text layer 5, an aluminum plating layer 6 and a glue layer.

Fig. 2 is a cross-sectional structure diagram of a product after hot stamping of a color aluminum foil, wherein the structure diagram comprises a paper layer 1, a local glue layer 2, a local aluminum-plated layer 3, a local color image-text layer 4 and a local laser stamping layer 5.

Detailed Description

The present invention will be further described with reference to specific embodiments.

Example 1: as shown in fig. 2, a color electrochemical aluminum hot stamping structure comprises, from bottom to top, a paper layer 1, a local glue layer 2, a local aluminum-plated layer 3, a local color image-text layer 4, and a local laser stamping layer 5.

The local glue part of the local glue layer 2, the local aluminum plating part of the local aluminum plating layer 3, the local color image-text part of the local color image-text layer 4 and the local laser stamping part of the local laser stamping layer 5 are opposite.

The new printing structure process has the following advantages: 1) The original hot stamping followed by printing of the image-text layout inevitably has bubbles and reverse drawing, and the hot stamping structure of the scheme is adopted, so that the smoothness of the color image-text is better; 2) The original laser effect of stamping before printing the pictures and texts is that the laser effect can be displayed only by increasing the transparency of an ink layer under a color picture ink layer during production, the color gorgeous degree of a printing layer is inevitably influenced, and the laser effect is weaker; the laser effect of the hot stamping structure of the utility model is on the front side of the printed pattern, the printed pattern can be printed as bright and full as possible, and the laser effect of the back stamping is stronger; 3) The original structure can realize that the area of the pattern which is firstly hot stamped and then printed is smaller, the hot stamping area of the structure can be enlarged by 2-3 times, and the design effect is improved.

Example 2: as shown in fig. 1-2, a printing method of a color electrochemical aluminum hot stamping structure comprises the following steps: according to the requirements of customers, printing the customer design patterns on the base film layer by using temperature-resistant ink, then carrying out online laser stamping to obtain a laser effect, sending the laser effect into vacuum aluminizing equipment for aluminizing processing to obtain a laser electrochemical aluminum foil with color pictures and texts, and then transferring the laser electrochemical aluminum foil onto a printing product by cursor positioning hot stamping to obtain a final finished product. The method comprises the following steps:

step one, designing and processing color pictures and texts: according to the customization requirements of customers, pictures or LOGO which are mainly expressed on the outer package required by the customers are designed into single-link printing pictures and texts, and are typeset according to the production on-machine specifications;

the color picture mainly takes CMYK four-color pictures as main components;

in order to ensure the registration and positioning of the images and texts during the hot stamping of the subsequent process, positioning cursor strips are required to be designed at two ends of the pictures, and the specification of the positioning cursor strips is 5 x 5mm;

during typesetting, the distance between the single-link images is 2mm, the front and the back need to be kept consistent, and the required error is less than 0.015mm;

the foil feeding direction during the later process processing needs to be considered during typesetting, and the existing gold stamping foil feeding direction mainly comprises a transverse direction or a longitudinal direction, so the image-text direction during typesetting needs to be consistent with the page direction after hot stamping;

the pictures and texts printed on the base film are mirror images with conventional visual angles, and become positive images after hot stamping processing;

step 2, selection and pretreatment processing of a base film: the base film is mainly made of a polyimide film base material with strong tensile resistance, and the thickness of the base film is 16-25 mu m; the base material needs pre-coating treatment, the coating of the pre-coating layer mainly comprises organic silicon resin binder (90 percent), and the purpose is to reduce the dyne value of the film surface, facilitate the clean separation of the aluminum plating layer during hot stamping transfer and avoid the reverse drawing of the paper surface;

step three, laser stamping processing: and (3) continuously coating a UV transparent gloss oil layer on the separation layer, wherein the UV transparent gloss oil layer mainly comprises the following raw materials:

acrylic acid polymer 75-85%

0.5 to 5 percent of surfactant

0.5 to 1 percent of defoaming agent

0.1 to 2 percent of smoothing agent

0.1 to 2 percent of friction resistant agent

1 to 5 percent of solvent

The ink is prepared by adopting a conventional printing ink preparation method according to the proportion.

Molding the UV transparent gloss oil layer by using a laser template to ensure that the base film bottom coating has a laser gloss effect;

step four, printing and processing of pictures and texts: carrying out local printing treatment on the base material obtained in the step three;

the printing ink adopted in the step needs to have high temperature resistance, and the printing ink mainly adopts inorganic pigment with strong temperature resistance and nitrocotton modified resin binder, so that the temperature resistance of the printed graph and text can reach 210 ℃. The printing ink picture and text are required to be contacted for 1-3 seconds at the high temperature of 135-160 ℃, the picture and text do not change color and are not decomposed by hot melting, and the formula of the printing ink is as follows:

65-80% of nitrocotton modified resin

5 to 10 percent of polyester acrylic resin

3 to 5 percent of titanium dioxide pigment white

3 to 5 percent of pigment black (red, yellow and blue)

Photoinitiator 369 1-5%

1 to 5 percent of photoinitiator TPO

1% -5% of photoinitiator ITX;

Step five, vacuum aluminizing processing: loading the base film obtained in the fourth step on an unreeling station of a vacuum evaporation machine, winding the film on a reeling station by passing through a cooling roller (evaporation roller), vacuumizing by using a vacuum pump to ensure that the vacuum degree in an evaporation chamber reaches above the specified requirement, and heating an evaporation boat to melt and evaporate high-purity aluminum wires into gaseous aluminum at high temperature. Starting the film winding system, and opening the baffle plate to deposit and cool gaseous aluminum particles on the surface of the moving film substrate after the film running speed reaches a rated value, so as to obtain an aluminizer with a reflecting mirror surface metallic luster effect;

step six, processing of a coating glue layer: coating glue on the surface of the alumite aluminized foil obtained in the fifth step, wherein the adopted glue mainly comprises acrylic resin and aims to be heated and melted during hot stamping and increase the hot stamping transfer adhesion fastness;

step seven, checking, cutting and processing of the laser printing aluminum-plated foil: cutting, detecting and rewinding the aluminum foil obtained in the step six on a rewinding machine with an automatic detection function, and requiring to remove waste products and joints, wherein the length of a single roll is preferably 900-1200 m;

step eight, hot stamping processing: and carrying out hot stamping processing on the colorful aluminum-plated foil obtained in the step seven to obtain a final finished product.

The stamping machine adopted in the step eight is a flat-pressing automatic stamping machine with a laser positioning probe and a constant 920, and during production, the position of the laser probe needs to be adjusted to ensure the stamping precision of the pattern;

the gold stamping plate adopted in the step eight requires a flat plate surface without sand holes and silk thread scratches, the material is mainly copper, and the gold stamping plate is easy to expand when heated, so that the overprinting precision requirement of the scheme is higher, and the periphery of the gold stamping plate is required to be contracted by 0.01-0.02mm when a gold stamping plate file is manufactured before printing;

the gold stamping plate used in the step eight needs to be manufactured by slightly protruding the edge of the plate surface towards the center when manufactured, the central protrusion is 0.002-0.005mm higher than the edge, and the middle part of the gold stamping plate needs to be slightly higher than the periphery by careful pagoda-shaped padding pressure when the plate is used for producing and operating the padding plate, so that the middle of the gold stamping plate can be ensured to be contacted first when the gold stamping plate is stamped, and the aim is to facilitate the air in the center of the gold stamping plate to easily escape when a large image and text is stamped and avoid the generation of gold stamping bubbles.

In the step eight, the hot stamping pressure is required to be 1.5-2.0 tons, the hot stamping speed is 4500-5000 sheets/hour, and the hot stamping temperature is 110-135 ℃.

The new printed structure process obtained as shown in fig. 2 has the following advantages: 1) The original image-text layout inevitably has bubbles and reverse tension, and the smoothness of the color image-text is better by adopting the structure of the scheme; 2) The laser effect of the original image and text is that the laser effect can be displayed only by increasing the transparency of the ink layer at the bottom of the color image ink layer, the colorful degree during printing is inevitably influenced, and the laser effect is weaker; the laser effect of the scheme is on the front side of the printed graph and text, so that the laser effect is stronger; 3) The original structure can realize that the area of stamping before printing is smaller, the area of the structure can be enlarged by 2-3 times, and the design effect is improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides a colored electrochemical aluminium thermoprint structure which characterized in that: comprises a paper layer (1), a local glue layer (2), a local aluminum plating layer (3), a local color image-text layer (4) and a local laser imprinting layer (5) from bottom to top.

2. The structure of claim 1, wherein: the local glue part of the local glue layer (2), the local aluminum plating part of the local aluminum plating layer (3), the local color image-text part of the local color image-text layer (4) and the local laser stamping part of the local laser stamping layer (5) are opposite.