Ink Jet Textile Printing Recording Method
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Solution Overview
Problem
Ink jet textile printing methods face challenges with image strike-through, deterioration in color developing properties, and rubbing fastness when attempting to apply pretreatment and coating liquids simultaneously using large equipment or complex processes.
Innovation Solution
An ink jet textile printing method involving a colored ink attachment step with a pigment and anionic first resin particles, a treatment liquid attachment step with a polyvalent metal salt, and a non-colored ink attachment step with anionic second resin particles, all performed by an ink jet method with specific attachment amounts and ratios to enhance color development and fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate apparatuses are used for pretreatment liquid application and coating liquid application, then color developing properties and fastness are improved, but device complexity and process complexity increase
Solution Approach 1:
The patent combines multiple liquid application functions (pretreatment liquid, colored ink, and clear ink application) into a single ink jet textile printing apparatus. The ink jet head is configured to eject multiple types of liquid droplets sequentially or simultaneously onto the fabric, eliminating the need for separate apparatuses while maintaining the functional benefits of each treatment stage.
Solution Approach 2:
The ink jet head is divided into multiple nozzle groups, with each nozzle group dedicated to ejecting a specific type of liquid droplet (pretreatment liquid, colored ink, or clear ink). This segmentation allows independent control and optimization of each liquid application process while integrating them into a single apparatus, thereby reducing device complexity without compromising color developing properties and fastness.
2Device complexity
If continuous attachment of pretreatment liquid and coating liquid is performed in the same apparatus, then device complexity is reduced, but image strike-through and deterioration in color developing properties occur
Solution Approach 1:
The ink jet head performs preliminary action by ejecting pretreatment liquid droplets onto the fabric before ejecting colored ink droplets onto the same scanning region. This sequential pretreatment ensures that the fabric surface is properly prepared, preventing image strike-through and maintaining color developing properties while still using a single apparatus for continuous attachment.
Solution Approach 2:
The ink jet head executes periodic action through multiple main scanning passes. In one main scanning, colored ink and clear ink are attached; in another main scanning, pretreatment liquid is attached to the same scanning region. This periodic alternation ensures proper liquid attachment sequences, preventing image strike-through while maintaining manufacturing precision.
3Reliability
If multiple resin particles are used in ink composition, then rubbing fastness is improved, but manufacturing precision may deteriorate due to complex composition control
Solution Approach 1:
The patent applies local quality by using different types of resin particles (first resin particles in colored ink, second resin particles in clear ink) with specific properties tailored to their respective functions. The first resin particles are optimized for color fastness, while the second resin particles are optimized for rubbing fastness and binder formation. This localized optimization improves rubbing fastness without requiring complex control of a single multi-component system.
Solution Approach 2:
The ink composition uses composite materials by combining pigment particles with specific resin particles (anionic first resin particles with positive charge density, and anionic second resin particles with higher positive charge density). This composite approach allows each component to contribute its specific properties, improving rubbing fastness while maintaining manageable composition control through well-defined material characteristics.
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 method improves color developing properties and rubbing fastness while minimizing image strike-through, achieved through the controlled attachment of ink components using an ink jet method, simplifying the process and reducing equipment complexity.
Implementation Method 1
a liquid droplet of a non-colored ink composition containing an anionic second resin particle
Implementation Method 2
the colored ink attachment step, the treatment liquid attachment step, and the non-colored ink attachment step are performed by an ink jet method
Data Source
AI summary
An ink jet textile printing recording method including a colored ink attachment step of attaching a liquid droplet of a colored ink composition containing a pigment and an anionic first resin particle to a fabric, a treatment liquid attachment step of attaching a liquid droplet of a treatment liquid containing a polyvalent metal salt to the fabric, and a non-colored ink attachment step of attaching a liquid droplet of a non-colored ink composition containing an anionic second resin particle to the fabric, the colored ink attachment step, in which the treatment liquid attachment step, and the non-colored ink attachment step are performed by an ink jet method, in the ink jet method, main scanning is performed for recording by moving an ink jet head in a direction perpendicular to a transport direction of the fabric, the colored ink composition, the treatment liquid, and the non-colored ink composition are attached to the same scanning region of the fabric by the same main scanning, an attachment amount of the polyvalent metal salt to the fabric is 0.3 (mg/inch2) or more, a content of the second resin particle with respect to a total amount of the non-colored ink composition is higher than a content of the first resin particle with respect to a total amount of the colored ink composition, and an attachment amount of the non-colored ink composition is smaller than an attachment amount of the colored ink composition.