Ink jet method and ink jet apparatus
An inkjet and nozzle technology, applied in the directions of printing devices, copying/marking methods, inks, etc., can solve the problems of reduced scratch resistance of the coating film, insufficient softness and adhesion of the coating film, etc.
Active Publication Date: 2020-08-18
SEIKO EPSON CORP
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Problems solved by technology
[0003] However, the radiation curable inkjet composition described in Patent Document 1 has the problem that the flexibility and adhesiveness of the coating film tend to be insufficient when used for marking applications.
In addition, a problem has also been found that if the ratio of monofunctional monomers to the whole monomers is increased in order to improve flexibility and adhesion, the scratch resistance of the coating film may decrease.
Method used
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[0169] Next, the present invention will be described more specifically using examples. The present invention is not limited in any way by the following examples.
[0170] 1. Preparation of Inkjet Composition
[0171] First, weigh a part of the coloring material, dispersant, and each monomer, and put into a tank body for dispersing the pigment, put a ceramic bead mill with a diameter of 1mm in the tank body and stir, thus obtaining the color material Pigment dispersion liquid dispersed in monomer. Next, put the remaining monomers, polymerization initiators, and polymerization inhibitors into the tank for the mixture, which is a stainless steel container, so that the composition described in Table 1 is obtained, and after mixing and stirring completely, the pigments obtained above are added. The dispersion liquid was further mixed and stirred at room temperature for 1 hour, and further filtered using a 5 μm membrane filter to obtain the radiation curable inkjet composition of ...
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Abstract
The invention discloses an ink jet method and an ink jet apparatus. The ink jet method uses a liquid jet head that includes a nozzle for discharging a radiation-curable ink jet composition, a pressurechamber to which the radiation-curable ink jet composition is supplied, and a circulation flow passage allowing the radiation-curable ink jet composition in the pressure chamber to circulate. The method includes discharging the heated radiation-curable ink jet composition by the liquid jet head. The radiation-curable ink jet composition includes a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component; the content of the monofunctional monomer component is 87 mass % or more based on the total amount of the polymerizable compound component; the weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42 DEG C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted; and the viscosity at 40 DEG C. is 10 mPas or more.
Description
technical field [0001] The present invention relates to an inkjet method and an inkjet device. Background technique [0002] Conventionally, for example, as described in Patent Document 1, a radiation-curable inkjet composition exhibiting good curability and flexibility after curing has been studied. In particular, Example 9 (Table 3) describes a radiation-curable inkjet composition comprising phenoxyethyl acrylate: 39% by mass, acryloylmorpholine: 20% by mass, n-vinylcaprolactam: 15% by mass, 2-(2-vinyloxyethoxy)ethyl acrylate: 10% by mass, difunctional urethane acrylate as a monomer. [0003] However, the radiation-curable inkjet composition described in Patent Document 1 has a problem that the flexibility and adhesiveness of the coating film tend to be insufficient when used for marking purposes. In addition, a problem has also been found that when the ratio of the monofunctional monomer to the whole monomer is increased in order to improve flexibility and adhesiveness,...
Claims
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IPC IPC(8): B41J2/01B41J11/00B41M5/00B41M7/00C09D11/30
CPCB41J2/01B41J11/002B41M5/0023B41M7/0081B41M7/009C09D11/30C09D11/101C09D11/322B41J11/00214C09D11/38
Inventor 田中恭平关根翠中野景多郎佐藤千草
Owner SEIKO EPSON CORP