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Preparation method of rainbow silver paste

A silver paste, rainbow technology, applied in the direction of pigment paste, ink, household appliances, etc., can solve the problems of surface and edge light scattering and diffuse reflection, uneven thickness of aluminum powder, darkening, etc., to improve printing adaptability, Reduce raw material consumption, rich and full color effect

Active Publication Date: 2015-12-02
SHANGHAI AO FAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum paste produced by this process has the following deficiencies: the one, that the color and luster is single silver; the other is that the surface of the aluminum powder is easily oxidized and darkened or even blackened; the other is that the powder sheet has a large thickness, so it is difficult to prepare a powder sheet with a thickness of only tens of nanometers; The third is that the thickness of the aluminum powder is uneven, the surface of the powder is uneven, and the scattering and diffuse reflection of the surface and edge light are serious, which affects the brightness, color and metallic feeling of the aluminum paste; the fourth is that the hiding power of the water surface is low, and the printing and coating area per unit is consumed. large
This patent is to directly vacuum-deposit high-purity aluminum layer on the plastic film to form an aluminum-coated film, and then perform molding, laser and other steps to obtain the product. It is inevitable that scratches will occur during peeling, which will affect its effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing rainbow silver paste, the method comprising the following steps: sequentially coating a release layer and an information layer on a PET film, and pressing a molding plate on the information layer at 200°C to form unevenness on the information layer , light refraction points of different sizes, and then use high-purity aluminum with a purity greater than 99.99% for vacuum aluminum plating, with a vacuum degree of 10 -2 ~10 -4 , perform aluminum plating to obtain an aluminum plating layer with a thickness of 400-500 ㎡, peel off the release layer from the PET film, clean and pulverize the stripped material to obtain the rainbow silver paste.

[0026] Wherein, the release layer is a coating formed by mixing nitrocellulose and cellulose acetate phthalate in a weight ratio of 1:1 and then dissolving the slurry obtained in an organic solvent. The solid content of the slurry is 5%. Described organic solvent comprises ethyl ester, butyl ester, methyl ace...

Embodiment 2

[0029] A preparation method of rainbow silver paste, the method comprises the following steps: sequentially coating a release layer and an information layer on a PET film, and pressing a molded plate on the information layer at 165°C to form unevenness on the information layer , light refraction points of different sizes, and then use high-purity aluminum with a purity greater than 99.99% for vacuum aluminum plating, with a vacuum degree of 10 -2 ~10 -4 , perform aluminum plating to obtain an aluminum plating layer with a thickness of 400-500 ㎡, peel off the release layer from the PET film, clean and pulverize the stripped material to obtain the rainbow silver paste.

[0030] Wherein, the release layer is a coating formed by mixing nitrocellulose and cellulose acetate phthalate in a weight ratio of 1:0.2 and then dissolving the slurry obtained in an organic solvent, and the solid content of the slurry is 1%. Described organic solvent comprises ethyl ester, butyl ester, methy...

Embodiment 3

[0033] A method for preparing rainbow silver paste, the method comprising the following steps: sequentially coating a release layer and an information layer on a PET film, and pressing a molded plate on the information layer at 220°C to form unevenness on the information layer , light refraction points of different sizes, and then use high-purity aluminum with a purity greater than 99.99% for vacuum aluminum plating, with a vacuum degree of 10 -2 ~10 -4 , perform aluminum plating to obtain an aluminum plating layer with a thickness of 400-500 ㎡, peel off the release layer from the PET film, clean and pulverize the stripped material to obtain the rainbow silver paste.

[0034] Wherein, the release layer is a coating formed by mixing nitrocellulose and cellulose acetate phthalate in a weight ratio of 1:2 and then dissolving the slurry obtained in an organic solvent. The solid content of the slurry is 10%. Described organic solvent comprises ethyl ester, butyl ester, methyl ace...

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Abstract

The invention relates to a preparation method of a rainbow silver paste, which comprises the following steps: sequentially coating a release layer and an information layer on a PET (polyethylene terephthalate) film, carrying out die pressing, aluminizing, peeling the release layer from the PET film, cleaning the peeled substance, and pulverizing to obtain the rainbow silver paste. Compared with the prior art, the rainbow aluminum paste prepared by the technique has the seven-color effect and the function of changing colors along with the angle, and has the advantages of abundant and full color and low cost.

Description

technical field [0001] The invention relates to a paint, in particular to a preparation method of rainbow silver paste. Background technique [0002] Aluminum paste composed of flake aluminum powder and solvent has various types and can display silver and colored metallic luster. Because of its good light reflection effect and long-lasting brightness, it is widely used in inks, coatings and other fields. [0003] Rainbow aluminum paste is based on ordinary flake aluminum powder, endowed with illusion effect, and can present a dazzling rainbow effect under strong light, and has multiple uses such as decoration and anti-counterfeiting. [0004] Aluminum paste is usually produced by ball milling. Spherical aluminum powder is used as raw material, which is turned into flake aluminum powder by wet ball milling, and then aluminum paste is made by grading, filtering, mechanochemical polishing and other processes. The aluminum paste produced by this process has the following defic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09D11/037B22F9/04B22F1/00
Inventor 李钢
Owner SHANGHAI AO FAN CHEM CO LTD
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