A kind of ultraviolet offset printing inline white ink and preparation method thereof

A technology of ultraviolet glue and white ink, applied in the printing field, can solve the problems of UV offset printing white ink printing speed and other problems that are difficult to have UV screen printing ink covering effect at the same time, so as to increase ink flexibility and weather resistance, high-efficiency covering power, increase flexibility and The effect of weather resistance

Active Publication Date: 2019-08-13
山东布瑞特油墨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem that traditional inks are difficult to have both the covering effect of UV screen printing ink and the printing speed of UV offset white ink, and provides a UV offset printing continuous white ink and its preparation method. The technical scheme is as follows:

Method used

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Examples

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preparation example Construction

[0036] The present invention also provides a preparation method of the above-mentioned ultraviolet offset printing on-line white ink, comprising the following steps:

[0037] S1: Pour polyester acrylate oligomer, dispersant and 40-60% monomer into a stirring tank, add titanium dioxide under stirring at 600-800rpm, and stir evenly to obtain a mixture;

[0038] S2: Grind the mixture to a particle size ≤ 5 μm to obtain a color paste, add thermoplastic acrylic resin, photoinitiator and remaining monomers to the color paste, stir evenly and filter with filter cloth to obtain UV offset printing Even machine white ink.

[0039] Preferably, a three-roll machine can be used for the grinding.

[0040] Preferably, the pore size of the filter cloth is 200-300 mesh.

[0041] The white ink of the ultraviolet offset printing machine provided by the present invention is white in appearance, its particle size is ≤5 μm (25 μm double-groove scraper fineness meter), the viscosity is 40-50″ (25°...

Embodiment 1

[0043] Pour 15.0% polyester acrylate oligomer, 2.0% dispersant and 5.0% monomer into a stirring tank, add 50.0% titanium dioxide under stirring at 600-800rpm, and stir evenly to obtain a mixture; Grind the mixture until the particle size is ≤5μm to obtain a color paste, add 20.0% thermoplastic acrylic resin, 3.0% photoinitiator and the remaining 5.0% monomer to the color paste, stir evenly and filter with filter cloth to obtain ultraviolet light On-press white ink for offset printing; the stated percentages are all mass percentages.

[0044] The white ink of the ultraviolet offset printing machine provided by the present invention is white in appearance, its particle size is ≤5 μm (25 μm double-groove scraper fineness meter), the viscosity is 40-50″ (25°C, Japan 4# cup), and the tinting strength is ≥98.0 % (compared with the standard sample).

Embodiment 2

[0046]Pour 20.0% polyester acrylate oligomer, 3.0% dispersant and 8.0% monomer into a stirring tank, add 50.0% titanium dioxide under stirring at 600-800rpm, and stir evenly to obtain a mixture; Grind the mixture until the particle size is ≤5 μm to obtain a color paste, add 15.0% thermoplastic acrylic resin, 3.0% photoinitiator and the remaining 7.0% monomer to the color paste, stir evenly and filter it with a filter cloth to obtain ultraviolet light On-press white ink for offset printing; the stated percentages are all mass percentages.

[0047] The white ink of the ultraviolet offset printing machine provided by the present invention is white in appearance, its particle size is ≤5 μm (25 μm double-groove scraper fineness meter), the viscosity is 40-50″ (25°C, Japan 4# cup), and the tinting strength is ≥98.0 % (compared with the standard sample).

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Abstract

The invention relates to the technical field of printing, and particularly discloses ultraviolet offset printing continuous machine white ink and a preparation method thereof. The ultraviolet offset printing continuous machine white ink is prepared from, by mass, 15.0%-25.0% of polyester acrylate oligomer, 10.0%-20.0% of thermoplastic acrylic resin, 40.0%-50.0% of titanium dioxide, 2.0%-3.0% of a dispersing agent, 3.0%-5.0% of a photoinitiator and 10.0%-20.0% of monomers. According to the ultraviolet offset printing continuous machine white ink, the covering power of traditional ultraviolet screen printing ink is compatible with the high-speed printing characteristics of ultraviolet offset printing ink, not only is the covering effect of the UV screen printing ink achieved, but also the high-speed cooperating requirement of the UV offset printing ink is achieved.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of printing, in particular to an ultraviolet offset printing on-line white ink and a preparation method thereof. [0003] 【Background technique】 [0004] Cigarette pack barcode white ink has experienced the following development process: UV (ultraviolet light) ink screen printing, UV offset printing (printing 2-3 times). The speed of UV screen printing is slow, and the production capacity is too low; UV offset printing needs two printings, sometimes even three printings, which requires high color sets of the machine, otherwise it needs two printings on the machine, which will waste time and cause excessive wear on the machine . [0005] The cigarette pack process has the following special requirements for white ink: 1. The white ink cannot contain silicon, so as not to affect the printing of the black ink of the barcode; 2. The black ink of the barcode must have good printability on the white ink, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/107C09D11/03C09D11/037
CPCC09D11/03C09D11/037C09D11/107
Inventor 李飞
Owner 山东布瑞特油墨有限公司
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