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Method for curing of an ink or toner layer and printing system with curing unit

A printing system and ink technology, which is applied to the equipment, ink, and printing of the electrical recording process using charge graphics, which can solve the problems of expensive ink, ink yellowing, etc., and achieve the effect of reducing odor, less migration, and improving surface curing.

Active Publication Date: 2020-04-10
西康制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With proper photoinitiator selection, desired surface and through cure can be achieved with LED curing; however, post-irradiation ink yellowing may occur due to fragmentation and / or recombination of photoinitiator fragments
This can be overcome by using very complex photoinitiators, making the ink very expensive
All in all, it is very difficult to combine the advantages of UV-LEDs at an acceptable cost without yellowing using existing technologies

Method used

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  • Method for curing of an ink or toner layer and printing system with curing unit
  • Method for curing of an ink or toner layer and printing system with curing unit
  • Method for curing of an ink or toner layer and printing system with curing unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0112]The samples were printed on a Fasson PP white substrate with UV curable cyan, magenta, yellow and black inks using a web based print engine at a speed of 50 m / min. After depositing the ink, a curing unit is placed with a first curing device emitting a first radiation dose D1 in the range of 320nm to 445nm, followed by a second curing device emitting in the range of 200 to 319nm The second radiation dose D2 within.

[0113] For samples 1 to 6, use a maximum power density of 24W / cm from ITL 2 A Solidcure 2HD unit from ® was used as the first curing unit, and a 140W / cm GEW mercury bulb was used as the second curing unit.

[0114] In samples 7, 8 and 10 a maximum power density of 24W / cm from ITL was used 2 A Solidcure 2HD device was used as the first curing device, and a 140W / cm GEW mercury bulb was used as the second curing device.

[0115] In sample 9 the cure speed was 25m / min instead of 50m / min and 140W / cm was used 2 GEW iron-doped light bulbs.

[0116] After the cu...

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Abstract

A method for curing of an actinic light sensitive ink or toner layer on a substrate comprising an irradiating step of irradiating the actinic light sensitive ink or toner layer, with a first radiationdose D1 in a first spectral range between 320 nm and 445 nm; followed by a second radiation dose D2 in a second spectral range between 200 nm and 319 nm, wherein the ratio D1 / D2 of the first radiation dose and the second radiation dose is between 0.25 and 500, more preferably between 0.25 and 200, even more preferably between 0.50 and 100.

Description

technical field [0001] The field of the invention relates to printing with energy curable inks or toners. Particular embodiments relate to a method for curing an actinic photosensitive ink or toner layer on a substrate, and to a printing system for implementing the method. Background technique [0002] Printing with energy curable inks or energy curable dry or liquid toners is known. Developments in this field have focused on more efficient curing of inks or toners after they have been deposited on a substrate. [0003] The first known type of energy curable inkjet printing system used a mercury (vapour) bulb. These bulbs are capable of producing one or more peak intensities (W / cm 2 ) and a certain dose of UV radiation (J / cm 2 ). UV radiation is classified according to the wavelength of emission. The following categories can be distinguished: Subclass A UV radiation (UVA: 320nm to 390nm), Subclass B UV radiation (UVB: 280nm to 320nm), Subclass C UV radiation (UVC: 200n...

Claims

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Application Information

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IPC IPC(8): B41J11/00B41M7/00B05D3/06G03G15/20G03G9/087C09D11/101
CPCB41M7/0081C09D11/101G03G9/08793G03G9/13B41J11/00214B41J11/00212B41M5/0023C09D11/30G03G9/0802C09D11/54
Inventor 洛德·埃里克·德赖斯·德普雷沃乌特·维克多·玛丽亚·佛沃特赫尔曼·简·戈蒂利芙·凡·德·斯查特尼克·贺尔曼斯沃特·巴尔特·廷尼·勒乌斯
Owner 西康制造有限公司
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