Ink treatment method for digital inkjet printing

A digital inkjet and treatment method technology, applied in water/sewage treatment, multi-stage water/sewage treatment, textile industry wastewater treatment, etc., can solve the problems of membranes being easily polluted, short service life, and poor mechanical properties. Achieve the effects of not being easily polluted, excellent mechanical properties, and good solvent resistance

Active Publication Date: 2022-02-22
浙江海印数码科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used membrane materials in the desalination process of inkjet ink are cellulose acetate series membranes, PA membranes, etc. Although this series of membranes can effectively remove the salt in inkjet inks, the membranes are easily polluted and have a short service life. and poor mechanical properties

Method used

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  • Ink treatment method for digital inkjet printing

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0042]S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.22:0.01. Add the mixed solution dropwise to the tetraethyl orthosilicate solution and stir at room temperature for 60 min, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0043] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane liquid. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the hollow...

specific Embodiment 2

[0048] S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.45:0.01. Add the mixed solution dropwise into the tetraethyl orthosilicate solution and stir at room temperature for 120 min, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0049] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane solution. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the ...

specific Embodiment 3

[0054] S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.25:0.01. Add the mixed solution dropwise to the tetraethyl orthosilicate solution and stir at room temperature for 70 minutes, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0055] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane solution. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the...

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Abstract

The invention discloses an ink processing method for digital inkjet printing, which comprises the following steps: firstly preparing polydopamine-modified silica sol, adding it to a polyacrylonitrile dimethylformamide solution, stirring and mixing to obtain a film liquid The DMF solution of polyethylene glycol is used as the core liquid to prepare a hollow membrane, and acrylamide and polyimide are polymerized on the surface of the hollow membrane to obtain a composite nanofiltration membrane; the inkjet ink is firstly treated by activated carbon adsorption , and then treated by the microfiltration osmosis processor, and then the permeate is placed in a nano permeator equipped with a composite nanofiltration membrane for desalination treatment. The advantage of the present invention is that the ink treatment method for digital inkjet printing can effectively remove the salt in the inkjet ink, has low energy consumption, and the membrane material used in the desalination process has stable membrane flux and good solvent resistance. Excellent mechanical properties, not easy to be polluted.

Description

technical field [0001] The invention relates to the field of dye preparation, in particular to an ink treatment method for digital inkjet printing. Background technique [0002] As a new technology combining digital information technology and textile printing, digital printing has become the mainstream direction of industrial upgrading and technological innovation in the textile industry due to its advantages such as short production cycle, rich colors, energy saving and environmental protection. Inkjet ink preparation is the core technology in the application of digital printing. Due to the monopoly of foreign countries on ink technology, there are few domestic high-quality inks. The higher ink cost hinders the popularization of digital printing, and textile printing and dyeing enterprises cannot apply it on a large scale. Localization of ink preparation technology is an effective way to reduce the cost of industrial digital printing. However, there are a large amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02B01D69/12B01D61/00C02F103/30
CPCC02F1/442C02F1/283C02F1/444B01D69/12B01D61/027C02F2103/30
Inventor 宋水友
Owner 浙江海印数码科技有限公司
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