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UV ray solidifying ink and imaging method

A line curing and ink technology, applied in the direction of ink, copy/marking method, printing, etc., can solve the problems of difficult to spray UV curing ink with high accuracy, high viscosity, difficult to continuously spray traditional ink with high stability and so on.

Inactive Publication Date: 2007-03-28
KONICA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it has been found that it is difficult to eject small droplets of UV ray-curable inks with high stability and precision because of the high viscosity of UV ray-curable inks compared to water-based inks
In particular, when ink droplets having a volume of less than 10 pl are ejected by a grayscale type head capable of changing the ink droplet size, it is difficult to continuously eject conventional ink with high stability, and to deposit it on a recording material with high accuracy

Method used

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  • UV ray solidifying ink and imaging method
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  • UV ray solidifying ink and imaging method

Examples

Experimental program
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Effect test

Embodiment 1

[0210] "Preparation of Ink for Inkjet"

[0211] Each of the following pigment compositions was dispersed with zirconia beads in a sand grinder for 4 hours and then in an ultrasonic disperser for 10 minutes to obtain yellow, magenta, cyan and black pigment dispersions.

[0212]

[0213] PY180 (2.5 parts by weight of Yellow HG AF LP901 produced by Clariant Co., Ltd.)

[0214] Aron oxetane OXT221 (produced by Toa Gosei 70 parts by weight Co., Ltd.)

[0215] Celloxide 2021P (Daicell Co., Ltd. 30 parts by weight production)

[0216] Dispersant Solsperse 24000 0.5 parts by weight (manufactured by Avecia Co., Ltd.)

[0217]

[0218] PR202 (2.5 parts by weight Quindo Magenta RV 6883B produced by Bayer Co., Ltd.)

[0219] Aron oxetane OXT221 (produced by Toa Gosei 70 parts by weight Co., Ltd.)

[0220] Celloxide 2021P (Daicell Co., Ltd. 30 parts by weight production)

[0221] Dispersant Solsperse 24000 0.375 parts by weight (manufactured by Avecia Co., Ltd.)

[0222]

[022...

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Abstract

A UV ray curable ink comprising pigment, a polymerizable compound, and a photopolymerization initiator, wherein the UV ray curable ink has an absolute value of a viscosity difference between a viscosity at 25 degree centigrade at shear rate 10 (1 / s) and a viscosity at 25 degree centigrade at shear rate 1000 (1 / s) being not more than 5 mPa. s, and has a surface tension at 25 degree centigrade of from 26 to 38 mN / m.

Description

technical field [0001] The present invention relates to an ultraviolet (UV) curable ink for inkjet recording and an image formation method using the ink. Background technique [0002] In recent years, an inkjet recording method has been developed, which is to spray UV-curable ink onto paper recording materials, and then use UV rays to cure the ink for practical use. Examples of such inks include those disclosed in WO99 / 29787, WO99 / 29788, WO97 / 31071, and Japanese Patent Nos. 5-214280 and 2002-188025. [0003] For example, the ink viscosity disclosed in WO99 / 29787 as an ink property is preferably not more than 35 mPa.s at 30°C. This represents conditions suitable for ink ejecting in the inkjet recording method. Also disclosed in the above document is an ink composition satisfying the ink conditions. [0004] The advantage of the inkjet recording method using UV ray-curable ink is that it can record on non-absorbent recording materials (not absorbing ink), but its disadvanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00C09D11/322C09D11/328C09D11/38
CPCC09D11/101C09D11/36
Inventor 仲岛厚志
Owner KONICA CORP