Manufacturing method for printed materials

The method of applying urethane resin-based ink and crosslinking agent-free overcoat liquid with controlled ratios addresses nozzle clogging and resin film thickness issues, achieving stable and high-fastness prints with maintained fabric texture.

JP7727443B2Active Publication Date: 2025-08-21RISO KAGAKU CORP
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Patent Information

Application Number
JP2021137032
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-08-25
Publication Date
2025-08-21
Estimated Expiration
2041-08-25

AI Technical Summary

Technical Problem

Existing inkjet printing methods using pigment inks face issues with fastness and texture due to nozzle clogging from high resin concentrations and crosslinking reactions in overcoat liquids, leading to poor ejection performance and thick resin coating films that impair fabric texture.

Method used

A method involving applying an aqueous ink containing urethane resin and pigment without a crosslinking agent, followed by heating, then applying an overcoat liquid with a crosslinking agent but without a reactive resin, and further heating, adhering to the ratio 0.5≦amount of crosslinking agent/amount of urethane resin≦10, to ensure stable ink and overcoat liquid performance.

Benefits of technology

This approach enhances the stability and fastness of the printed item while maintaining the fabric's texture by preventing nozzle clogging and ensuring even crosslinking of the urethane resin, resulting in improved ejection performance and high image density.

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Abstract

To provide a method for manufacturing printed matter which is excellent in stability of ink and an overcoat liquid.SOLUTION: A method for manufacturing printed matter includes a first step of adding aqueous ink which contains a urethane resin (A), a pigment and water and does not contain a crosslinking agent to a cloth, by an inkjet recording method, a second step of heating the cloth to which the aqueous ink is added, a third step of adding an overcoat liquid which contains a crosslinking agent (B) and water and does not contain a resin reactive with the crosslinking agent to the cloth heated in the second step, by the inkjet recording method, and a fourth step of heating the cloth to which the overcoat liquid is added, and satisfies the following expression 1. (1) 0.5≤addition amount of crosslinking agent (B) contained in overcoat liquid / addition amount of urethane resin (A) contained in aqueous ink≤10. In the expression 1, the addition amount of the urethane resin (A) and the addition amount of the crosslinking agent (B) represent masses per unit area of a region where the aqueous ink and the overcoat liquid are superposed and imparted.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Improvement of washing resistance of pigment print

    JP1993230778A

  • Fiber having high moisture absorbing and desorbing property and method for producing the same

    JP2003227071A

  • Ink set and inkjet recording method

    JP2005022329A

  • Aqueous composition of acrylic copolymer for textile printing

    JP2005139340A

  • Inkjet inks, ink sets, and printing methods

    JP2007514809A