Textile Printing Fabric Pretreatment for Ink Bleeding Control
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Solution Overview
Problem
Conventional methods for preventing ink bleeding in textile printing, such as those using water-soluble polymers or surfactants, are insufficient in ensuring sharp image formation and storage stability of fabrics.
Innovation Solution
A method involving impregnation of fabrics with a processing solution containing an organic acid with two or more carboxy groups, a surfactant, and a solvent, followed by solvent removal through squeezing and air drying, and optionally heat pressing, to produce a fabric that effectively prevents ink bleeding and forms sharp images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inkjet textile printing is used without plate making, then productivity is improved, but ink bleeding occurs leading to poor manufacturing precision
Solution Approach 1:
The fabric is pretreated by impregnating it with a processing solution containing an organic acid having two or more carboxy groups before inkjet printing. This preliminary action modifies the fabric surface to prevent ink bleeding, thereby maintaining manufacturing precision while preserving the productivity benefits of plateless inkjet printing.
Solution Approach 2:
The invention changes the chemical parameters of the fabric surface by applying a processing solution with specific organic acids (0.1 to 0.7% by mass). This parameter change in the fabric's surface chemistry prevents ink bleeding without affecting the inkjet printing process itself, thus maintaining both productivity and image sharpness.
2Manufacturing precision
If water soluble polymer is used for preventing ink bleeding, then manufacturing precision is improved, but storage stability deteriorates
Solution Approach 1:
The invention replaces water-soluble polymers with organic acids having two or more carboxy groups, changing the chemical parameter of the pretreatment agent. This substitution maintains ink bleeding prevention capability while significantly improving the storage stability of the treated fabric, as organic acids are more stable than water-soluble polymers during storage.
Solution Approach 2:
The invention uses small molecular weight organic acids instead of large water-soluble polymer molecules. These smaller molecules provide the necessary bleeding prevention function during printing but do not cause the storage stability issues associated with polymers, effectively replacing long-lived but unstable materials with shorter-lived but more stable alternatives.
3Manufacturing precision
If surfactant is used in ink for preventing bleeding, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The invention introduces a processing solution containing organic acid as an intermediary substance that acts between the fabric and the ink. This intermediary modifies the fabric surface properties to control ink impregnation and prevent bleeding, simplifying the overall system by replacing complex surfactant-based ink formulations with a straightforward fabric pretreatment 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 method produces a fabric with excellent ink bleeding prevention performance, enabling the formation of sharp images and improving storage stability, while maintaining fabric handleability and preventing yellowing.
Implementation Method 1
impregnating a fabric to be processed with a processing solution containing an organic acid having two or more carboxy groups
Implementation Method 2
volatilizing the solvent for removal by air drying the fabric to be processed and by heating the fabric to be processed after the air drying
Implementation Method 3
a surfactant including acetylene alcohols or an antifoaming agent
Data Source
AI summary
Disclosed is a method for producing a fabric for textile printing, which is characterized by comprising an impregnation step in which a fabric to be processed is impregnated with a processing solution that contains a solvent and an organic acid having two or more carboxyl groups, and a removal step in which the solvent is removed from the fabric to be processed that has been impregnated with the processing solution.