Perspective laser holography anti-fake film with reflecting effect and preparing method thereof

A technology of laser holography and anti-counterfeiting film, which is applied in the direction of chemical instruments and methods, printing of special varieties of printed matter, printing technology, etc., and can solve problems affecting the service life of documents and anti-counterfeiting functions, peeling off of information layers and documents, and covering of document information. , to achieve the effect of avoiding identification difficulties, ensuring service life, and ensuring anti-counterfeiting functions

Active Publication Date: 2013-10-16
SHANGHAI HONGDUN ANTI COUNTERFEIT MATERIAL
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

For the physical anti-counterfeiting components of legal documents with laser holography as the main body of anti-counterfeiting, the most direct parameter of its good appearance effect is the diffraction efficiency. In addition to the effect of the laser holographic image itself, the higher diffraction efficiency must be supplemented by a reflective layer with a certain thickness. The thicker the reflective layer, the higher the diffraction efficiency, but the side effect is that the document information covered by the anti-counterfeiting film is covered, making it difficult to identify
At the same time, in order to ensure that the certificate has a certain degree of stiffness, the anti-counterfeiting film used in the certificate is generally relatively thick, so it is easy to peel off the information layer from the certificate, which seriously affects the service life and anti-counterfeiting function of the certificate.
Among the existing document anti-counterfeiting technologies, each has its advantages in terms of appearance effect, visual recognition of information and durability, but there is no report on the situation where the three are satisfied at the same time.

Method used

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  • Perspective laser holography anti-fake film with reflecting effect and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 is a method for preparing a physical anti-counterfeiting film for legal documents:

[0062] Step 1: Replication of the laser holographic working plate. The thickness of the working plate is 60μ, the thickness error of the working plate is ±1μ, the thickness of the center is 1μ / 10cm higher than the edge, the electroforming current is 5A / hour, and the temperature of the electroforming solution is 37°C.

[0063] Step 2: Surface treatment of the PET substrate layer. The corona energy is 90w / ㎝, the thickness of the PET film is 75μ, the visible light transmittance of the PET film is 92%, and the haze is 1%.

[0064] Step 3: Coating the chelating layer by gravure printing. The wet coating amount is 5-15g / ㎡, the coating thickness is 3-6μ, the PH value of the emulsion is 7, a 5-stage oven is used, the total length is 20m, and the temperature is respectively set at 95°C, 130°C, 150°C, and 125°C , 80 ℃, speed 40m / min.

[0065] Step 4: Open key processing, informat...

Embodiment 2

[0073] Embodiment 2, is a kind of preparation method that is used for the physical anti-counterfeiting film of pass document between ports:

[0074] Step 1: Replication of the laser holographic working plate. The thickness of the working plate is 60μ, the thickness error of the working plate is ±1μ, the thickness of the center is 1μ / 10cm higher than the edge, the electroforming current is 5A / hour, and the temperature of the electroforming solution is 37°C.

[0075] Step 2: Surface treatment of the PET substrate layer. The corona energy is 90w / ㎝, the thickness of the PET film is 75μ, the visible light transmittance of the PET film is 92%, and the haze is 1%.

[0076] Step 3: Coating the information layer. Gravure coating method, wet coating weight 4g / m 2 , the thickness is 1.2μ, the coating viscosity is 16 seconds (3# Chaen Cup), and the oven temperature is set to 85°C, 110°C, 150°C, 120°C, 90°C respectively. The coating pressure is 2.0kg, the scraper pressure is 2kg, and t...

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Abstract

The invention relates to the technical field of physic anti-fake parts of legal certificates, in particular to a perspective laser holography anti-fake film with a reflecting effect and a preparing method thereof. The anti-fake film comprises a base material layer, an information layer, a reflecting layer, a protection layer, a blocking layer and a bonding layer which are combined together in sequence form top to bottom, wherein a sequestration layer is arranged between the base material layer and the information layer, the base material layer is a PET polyester film, the information layer is an acrylic resin layer, and the base material layer and the information layer are integrated through the sequestration layer. The prepared method of the anti-fake film comprises the steps of (1) copying of a laser holography working version, (2) treating of the surface of the PET base material, (3) coating of the sequestration layer, (4) key opening treatment, (5) coating of the information layer, (6) transferring and copying of a holographic grating, (7) manufacturing of the reflecting layer, (8) protecting of the reflecting layer, (9) curing, (10) fine chemical etching, (11) coating of the blocking layer, (12) corona, and (13) coating of the bonding layer. According to the perspective laser holography anti-fake film with the reflecting effect and the preparing method thereof, a major breakthrough is made in respects of certificate binding force, hologram image diffraction efficiency and visual identification of certificate information.

Description

[technical field] [0001] The invention relates to the technical field of physical anti-counterfeit components of statutory certificates, in particular to a see-through laser holographic anti-counterfeit film with reflection effect and a preparation method thereof. [Background technique] [0002] As the anti-counterfeiting film of the physical anti-counterfeiting part of legal documents, good appearance effect, visual recognition of document information and excellent durability are three essential basic conditions. For the physical anti-counterfeiting components of legal documents with laser holography as the main body of anti-counterfeiting, the most direct parameter of its good appearance effect is the diffraction efficiency. In addition to the effect of the laser holographic image itself, the higher diffraction efficiency must be supplemented by a reflective layer with a certain thickness. The thicker the reflective layer, the higher the diffraction efficiency, but the sid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02B32B9/04B32B27/00B41M3/14
Inventor 黄斗兴刘庆佩朱云峰顾文佳
Owner SHANGHAI HONGDUN ANTI COUNTERFEIT MATERIAL
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