Inkjet processing fluid, and ink set and printing method using same
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Solution Overview
Problem
Inkjet processing solutions for textile printing face issues with corrosive ions causing metal head corrosion and binder resin penetration leading to fabric stiffness and texture degradation, while existing solutions for paper printing are inadequate for textiles.
Innovation Solution
An inkjet processing solution containing a cationic polymer and lactic acid with a halogen ion concentration of 5 g/L or less and a pH of 7 to 9.5, which reacts with ink pigments to enhance chromogenic properties while minimizing corrosion and yellowing, and using an anionic pigment ink to prevent binder resin penetration into fabric fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a processing solution containing reactive fine particles is used to enhance chromogenic properties, then image density is improved, but corrosive ions cause metal head corrosion
Solution Approach 1:
The patent extracts and removes corrosive ions (halogen ions) from the processing solution through ion exchange methods, retaining only the beneficial reactive fine particles and binder resin components needed for image formation while eliminating the harmful corrosion-causing ions
Solution Approach 2:
The patent changes the chemical composition parameters of the processing solution by controlling the concentration of corrosive ions and adjusting the ratio of reactive fine particles to binder resin, thereby achieving both high image density and corrosion prevention
2Stability of the object's composition
If binder resin is added to the processing solution to prevent fabric stiffness, then fabric texture is improved, but binder resin penetration into fabric fibers occurs
Solution Approach 1:
The patent optimizes the concentration parameter of binder resin in the processing solution, maintaining it at a specific level that provides sufficient fabric softness while preventing excessive penetration that would compromise image quality
Solution Approach 2:
The patent creates a composite processing solution containing both reactive fine particles and binder resin in specific proportions, where the fine particles provide chromogenic properties and the binder resin controls fabric texture, with both components working synergistically
3Duration of action of stationary object
If the concentration of corrosive ions is reduced to prevent head corrosion, then metal head durability is improved, but dispersion stability of reactive components deteriorates
Solution Approach 1:
The patent introduces binder resin as an intermediary substance that maintains dispersion stability of reactive fine particles without requiring high concentrations of corrosive ions, thereby protecting the metal head while ensuring component stability
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 solution effectively suppresses corrosion of inkjet heads and yellowing of textiles, achieving excellent image density and improving fabric texture by preventing binder resin penetration, thus enhancing the quality of textile prints.
Implementation Method 1
a preprocessing solution is applied prior to application of ink... containing a cationic polymer... which reacts with ink pigments to enhance chromogenic properties
Implementation Method 2
contains a cationic polymer and lactic acid... and a pH of 7 to 9.5
Implementation Method 3
using an anionic pigment ink to prevent binder resin penetration into fabric fibers
Data Source
AI summary
An aspect of the present invention relates to an inkjet processing solution including a cationic polymer and lactic acid, where halogen ion concentration is 5 g/L or less and pH is 7 to 9.5.