Treatment agent and ink set
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Solution Overview
Problem
Existing printing technologies face challenges in achieving excellent water resistance and transportability of printed fabrics, as well as maintaining the original feel and hardness of recording media during and after printing, especially when exposed to water.
Innovation Solution
A treatment agent comprising a non-cationic sizing agent and a cationic substance, such as a cationic polymer capable of forming a flexible film, a cationic surfactant, or a polyvalent metal salt, applied to the recording surface of paper or fabric to enhance water resistance and transportability, while maintaining the original properties of the fabric.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a treatment agent is applied to improve water resistance of printed fabric, then water resistance is improved, but the original feel and hardness of the fabric may be altered
Solution Approach 1:
The patent applies parameter changes by selecting specific cationic substances (polymer type, molecular weight, charge density) and sizing agents with controlled concentrations and molecular characteristics. By adjusting these parameters, the treatment achieves water resistance while minimizing impact on fabric hand feel and hardness through optimized chemical composition rather than brute-force treatment
Solution Approach 2:
The treatment agent uses composite material principles by combining cationic substances (polymers, surfactants, or metal salts) with non-cationic sizing agents in specific ratios. This composite approach creates a synergistic effect where the cationic component provides water resistance through interaction with anionic colorants, while the sizing agent component maintains fabric structure and original characteristics
2Ease of operation
If a treatment agent is applied to improve transportability of recording medium during printing, then transportability is improved, but the recording medium may experience warping
Solution Approach 1:
The patent controls the molecular weight and concentration of the sizing agent to optimize the balance between transportability and warping prevention. By adjusting these parameters, the treatment provides sufficient stiffness for easy handling and transport during printing while avoiding excessive rigidity that would cause warping of the recording medium
Solution Approach 2:
The non-cationic sizing agent acts as an intermediary substance between the fabric fibers and the external environment. It modifies the surface properties and inter-fiber interactions to improve transportability without fundamentally altering the fabric structure, thereby preventing warping while enabling easier handling
3Reliability
If cationic substance is used to enhance coagulation and viscosity for water resistance, then water resistance is improved, but the complexity of the treatment composition increases
Solution Approach 1:
The cationic substance is designed to perform multiple functions simultaneously: it provides water resistance through coagulation with anionic colorants, adjusts viscosity for proper application, and contributes to the overall stability of the treatment composition. This multi-functionality reduces the need for separate additives, simplifying the overall composition despite the sophisticated performance requirements
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 treatment agent significantly improves the water resistance and transportability of printed materials, ensuring the printed fabric retains its original feel and hardness after washing, with the cationic substance interacting with anionic colorants to enhance coagulation and viscosity, and the non-cationic sizing agent preventing warping.
Implementation Method 1
the cationic substance interacting with anionic colorants to enhance coagulation and viscosity
Implementation Method 2
a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried
Data Source
AI summary
There is provided a treatment agent applicable to a recording surface of a recording medium which is recording paper or fabric. The treatment agent contains: a non-cationic sizing agent; and at least one cationic substance which is selected from the group consisting of: a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried, a cationic surfactant, a polyvalent metal salt and a polyvalent metal ion.