Set And Ink Jet Recording Method
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Solution Overview
Problem
The existing ink jet recording methods for textiles face challenges with wet rub fastness, as the ink compositions used do not effectively adhere to fabrics, leading to interfacial peeling and poor durability, especially when using polyester-based fibers.
Innovation Solution
A set comprising a reaction solution composition with a cationic urethane resin, a water-soluble organic solvent, and water, and an ink jet ink composition with a crosslinkable urethane resin, pigment, and water, which are jetted using an ink jet method to enhance adhesion and interfacial strength on fabrics, including the use of a post-treatment liquid composition with organopolysiloxane particles to improve wet rub fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ink jet ink compositions are used for textile printing, then the printing process can be performed, but wet rub fastness to fabrics is degraded
Solution Approach 1:
The patent applies preliminary action by using a reaction solution composition containing a cationic urethane resin that is jetted before or simultaneously with the ink jet ink composition. This cationic resin pre-treats the fabric surface to enhance subsequent adhesion of the pigment-containing ink, preventing interfacial peeling and improving wet rub fastness through advance surface modification.
Solution Approach 2:
The patent employs composite materials by combining a cationic urethane resin with a crosslinkable urethane resin in the ink composition. This composite system creates a dual-function coating: the cationic resin provides initial adhesion to the fabric while the crosslinkable resin forms a durable crosslinked network that locks the pigment in place, significantly improving both adhesive strength and wet rub fastness.
2Reliability
If ink compositions are applied to fabrics, then color can be deposited, but interfacial peeling occurs leading to poor durability
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the ink system. Specifically, it introduces a cationic urethane resin with positive charge density and combines it with a crosslinkable urethane resin, changing the chemical properties of the ink-fabric interface to enhance bonding stability and prevent interfacial peeling under wet conditions.
Solution Approach 2:
The cationic urethane resin acts as an intermediary between the fabric substrate and the pigment-containing ink composition. This intermediary layer provides a charged surface that enhances pigment attachment while the crosslinkable resin creates a stable matrix, collectively improving interfacial stability and preventing peeling.
3Productivity
If existing ink sets are used for ink jet recording, then recording can be performed, but wet rub fastness is degraded
Solution Approach 1:
The patent applies segmentation by dividing the ink system into two distinct compositions: a reaction solution composition containing the cationic urethane resin and a separate ink jet ink composition containing the pigment and crosslinkable resin. This segmentation allows each component to perform its specialized function optimally while maintaining overall system productivity.
Solution Approach 2:
The ink jet system achieves multi-functionality by combining deposition capability with enhanced fastness properties. The reaction solution composition provides adhesion promotion while the ink composition delivers pigment deposition, and together they achieve both productive recording and reliable wet rub fastness in a single integrated process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution significantly improves wet rub fastness and color developability of printed materials on fabrics, reducing interfacial peeling and enhancing the adhesive strength, while maintaining excellent clogging properties and jetting stability.
Implementation Method 1
make the reaction solution composition and the ink jet ink composition adhere to a fabric
Implementation Method 2
an ink containing a crosslinkable urethane resin
Data Source
AI summary
Provided is a set including a reaction solution composition and an ink jet ink composition, in which the reaction solution composition contains a cationic urethane resin, a water-soluble organic solvent, and water, the ink jet ink composition contains a pigment, a crosslinkable urethane resin, and water, and the set is used to jet the reaction solution composition and the ink jet ink composition by an ink jet method to make the reaction solution composition and the ink jet ink composition adhere to a fabric.