Fabric Treatment Agent pH Control for Bleed-Free Image Printing
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Solution Overview
Problem
Existing image forming methods for fabrics, such as those using ink-jet technology, often result in ink bleeding and impregnation, leading to discoloration, especially on light-colored fabrics like pastel shades.
Innovation Solution
A treatment agent comprising a resin emulsion and a metal salt, with a pH adjusted between 5.5 and 9, is applied to the fabric to prevent ink bleeding and discoloration, using a method that includes a heat-fixing step to form a treatment layer on the fabric surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pretreatment agent is adhered to cloth prior to image formation, then ink bleeding and impregnation are suppressed, but discoloration occurs on the fabric especially on light-colored fabrics
Solution Approach 1:
The patent applies parameter changes by carefully controlling the pH value of the treatment agent within a specific range (5.5-9) and adjusting the solid content concentration (1-50%). This optimization of chemical parameters allows the treatment agent to prevent ink bleeding while minimizing fabric discoloration, resolving the contradiction between image quality and fabric appearance
Solution Approach 2:
The treatment agent is formulated as a composite material containing resin emulsion, metal salt, and optional pH adjusters. This composite composition provides synergistic effects where the resin emulsion forms a protective layer, the metal salt enhances ink fixation, and the pH adjuster maintains optimal conditions, collectively preventing both ink bleeding and fabric discoloration
2Object-affected harmful factors
If the pH value of the treatment agent is adjusted to prevent discoloration, then fabric color integrity is maintained, but the treatment agent composition becomes more complex
Solution Approach 1:
The patent uses pH adjusters (such as sodium hydroxide, potassium hydroxide, or ammonia) as intermediary substances to control the pH value of the treatment agent. These intermediaries enable precise pH adjustment without fundamentally altering the core composition of resin emulsion and metal salt, thus maintaining color integrity while limiting complexity increase to specific additive components
3Object-affected harmful factors
If a treatment agent with optimized pH and composition is used, then fabric discoloration is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The patent implements preliminary action by pre-adjusting the pH value and solid content concentration during treatment agent formulation before application. This preliminary optimization ensures that the treatment agent is ready for immediate use with optimal performance characteristics, preventing fabric discoloration without requiring complex adjustments during the manufacturing or application 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 solution effectively prevents discoloration on fabrics during image formation, maintaining the original color integrity and ensuring stable image retention without compromising the fabric's properties.
Implementation Method 1
a method that includes a heat-fixing step to form a treatment layer on the fabric surface
Implementation Method 2
a pretreatment method in which a pretreatment agent is adhered to a cloth prior to image formation on the cloth in order to suppress the bleeding of an ink on the surface of the cloth and the impregnating of an ink into the cloth
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4B
AI summary
Provided is a treatment agent used for forming an image on fabric, containing a resin emulsion and a metal salt. A pH of the treatment agent is in a range from 5.5 to 9. The pH may be adjusted using a pH adjuster. Examples of the pH adjuster include sodium bicarbonate, potassium carbonate, calcium carbonate, sodium hydroxide, sodium carbonate, triethanolamine, and N-butyl diethanolamine.