Sublimation Ink Composition for Stable Low-Blur Textile Printing
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Solution Overview
Problem
The existing ink jet ink compositions for sublimation transfer textile printing face issues with poor storage stability and image blur due to the decomposition of siloxane surfactants, which affects the surface activity and quality of the printed images.
Innovation Solution
The use of a sublimation dye ink composition that includes a polyether siloxane with a weight average molecular weight of 1000 or more and 5 or more siloxane repeating units, along with a resin dispersant, maintains high surface activity and stability even after decomposition, ensuring low surface tension and reduced image blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a siloxane surfactant is added to improve surface activity and lower surface tension, then the ink composition achieves good initial printing quality, but the siloxane surfactant decomposes over time leading to poor storage stability and image blur
Solution Approach 1:
The patent changes the molecular weight parameter of the siloxane surfactant from conventional low molecular weight to high molecular weight (1000 or more), and specifies having 5 or more siloxane repeating units. This parameter change makes the siloxane surfactant more resistant to decomposition while maintaining surface activity, thus improving storage stability without sacrificing image quality
Solution Approach 2:
The patent uses a composite approach by combining the high molecular weight siloxane surfactant with specific dispersants and sublimation dyes in defined proportions. This composite formulation creates synergistic effects that enhance both the stability and surface activity of the ink composition, resolving the contradiction between storage stability and image quality
2Stability of the object's composition
If a dispersant is used to improve dispersion stability of sublimation dye, then dispersibility is enhanced, but surface activity of the siloxane surfactant changes leading to poor storage stability
Solution Approach 1:
The patent specifies particular parameters for the dispersant including molecular weight range and chemical structure characteristics. These parameter specifications ensure that the dispersant effectively disperses the sublimation dye without interfering with the surface activity of the high molecular weight siloxane surfactant, thus maintaining both dispersion stability and storage stability
Solution Approach 2:
The patent applies the local quality principle by having the dispersant specifically target the dye particles for dispersion, while the high molecular weight siloxane surfactant maintains its surface activity at the air-liquid interface. This functional separation allows both dispersing and surfactant actions to occur simultaneously without mutual interference
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 achieves high storage stability and produces high-quality images with minimal blur, even after long-term storage, by maintaining low surface tension and stable surface activity through the use of polyether siloxane with a high molecular weight and multiple siloxane units.
Implementation Method 1
the surface tension of the ink jet ink composition is able to be kept low, and thus a high-quality image having high storage stability of ink and having less blur is produced
Implementation Method 2
the sublimation dye is sublimated by vapor or heat, for example, to dye the print target medium (fabric, for example)
Data Source
AI summary
An ink jet ink composition includes a sublimation dye, a dispersant for the sublimation dye, and polyether siloxane having a weight average molecular weight of 1000 or more and having 5 or more siloxane repeating units.