Decorative imaging process using fibrous nib markers with specific disperse dye compositions
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Solution Overview
Problem
Existing fibrous nib marking pens face issues with clogging due to unstable dispersion of disperse dye particles, use of environmentally unfriendly solvents, high viscosity inks, and difficulty in achieving low viscosity without premature drying, making them unsuitable for consumer use, especially for customizing textiles and novelty items.
Innovation Solution
A low viscosity, non-clogging, consumer and environmentally friendly heat transfer disperse dye ink composition is developed for use in fibrous nib marking pens, comprising 50-90% water, 5-45% water miscible solvent, 0.5-10% disperse or solvent heat transfer dye particles, and additional components like biocides, surfactants, and viscosity modifiers, allowing for stable ink delivery and transfer via heat, pressure, and time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If disperse dye particles are used in fibrous nib marking pens, then sublimation imaging capability is achieved, but nib clogging occurs due to unstable dispersion
Solution Approach 1:
A dispersant is introduced as an intermediary substance between the disperse dye particles and the aqueous carrier. The dispersant stabilizes the dye particles in suspension, preventing them from aggregating and clogging the nib. This mediator enables the incompatible components (solid dye particles and liquid carrier) to coexist stably.
Solution Approach 2:
The particle size of the disperse dye is controlled to be within a specific range (0.1-10 micrometers), and the pH of the ink composition is adjusted (5-9) to optimize dispersant effectiveness. These parameter changes ensure stable dispersion and prevent nib clogging while maintaining sublimation imaging capability.
2Productivity
If traditional solvents are used in disperse dye inks, then dye dissolution and transfer are improved, but environmental friendliness and consumer safety deteriorate
Solution Approach 1:
The ink composition is changed from solvent-based to water-based (80-95% water content). This fundamental parameter change eliminates harmful organic solvents while maintaining effective dye transfer through optimized water-miscible solvent additives and dispersant systems.
Solution Approach 2:
Chemical solvents are replaced with an aqueous system enhanced by surfactants and dispersants. The water-based system achieves comparable or superior dye transfer efficiency through the synergistic action of multiple benign components, substituting harmful chemical mechanisms with safer alternatives.
3Ease of operation
If ink viscosity is reduced for better flow, then nib operation is improved, but premature drying occurs
Solution Approach 1:
The ink formulation includes water-miscible solvents (5-20%) and surfactants (0.1-5%) that modify the ink's evaporation characteristics. These parameter changes allow the ink to maintain low viscosity for smooth nib operation while reducing premature drying through controlled evaporation rates.
Solution Approach 2:
The ink composition is designed to maintain stable flow characteristics throughout the ink reservoir and nib system. The continuous presence of dispersants and surfactants ensures consistent ink delivery without interruption from clogging or premature drying, enabling continuous useful action.
4Reliability
If polymeric binders are added to fix pigment, then mark permanence is improved, but sublimation capability is lost
Solution Approach 1:
Polymeric binders are completely removed from the ink formulation. Instead, the disperse dye particles themselves serve as the marking mechanism, sublimating directly from the nib through the fibrous material to create a permanent image without requiring binder fixation. This extraction of the binder component enables sublimation capability.
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 ink composition enables efficient, stable, and safe deposition of sublimation images on various substrates, ensuring long-term light stability and compliance with safety standards, while preventing nib clogging and maintaining environmental friendliness, allowing for customized decoration of textiles and other items.
Implementation Method 1
Disperse dyes are solid at room temperature but vaporize (sublimate) at elevated temperature and then condense back to solid when cooled
Implementation Method 2
the nib functions to wick an ink from a reservoir and dispense the ink onto a substrate or other surface
Implementation Method 3
aqueous carrier, 0.1-5% dispersant, and 0.5-10% disperse or solvent heat transfer dye particles
Data Source
AI summary
Provided are processes of placing an image on an object that includes optionally filling a hand held nib-based marker with a child and environmentally friendly aqueous based heat transfer disperse dye ink composition, and imaging an intermediate substrate with the marker. A process optionally further includes optionally drying the image, optionally heating the intermediate substrate, optionally placing the inked intermediate substrate in contact with a dye receptive surface of a receptive object, and optionally transferring the image to the receptive object by application of sufficient heat and pressure.