Phase Change Ink Composition for Coated Substrate Printing
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Solution Overview
Problem
Conventional phase change ink technologies are not satisfactory for printing on coated substrates, lacking the ability to provide excellent image quality and are not well-suited for fast printing environments like production printing.
Innovation Solution
A phase change ink composition comprising a crystalline diamide compound with an aromatic core, an amorphous component, and optionally a colorant, which has specific viscosity properties at different temperatures to enable effective printing on various substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional phase change ink technologies are used, then printing on porous papers is successful with vivid images, but printing on coated substrates produces unsatisfactory image quality
Solution Approach 1:
The patent modifies the chemical composition parameters of the phase change ink by incorporating specific diamide compounds with aromatic cores (terephthalic acid, isophthalic acid, or m-phenylenediamine derivatives) to change the ink's interaction properties with coated substrates, thereby improving image quality while maintaining substrate versatility
Solution Approach 2:
The invention creates a composite ink formulation combining crystalline diamide compounds with amorphous components (waxes, resins, or oils) to achieve both excellent image quality on coated substrates and appropriate phase change characteristics for ink jet printing
2Reliability
If phase change ink is used, then nozzle clogging is eliminated and reliability is improved, but printing speed is limited for production printing environments
Solution Approach 1:
The patent utilizes controlled phase transitions of the diamide compound-based ink between solid and liquid states at specific temperatures, enabling rapid solidification after jetting which allows for higher printing speeds while maintaining nozzle reliability through complete phase change and prevention of residual clogging
Solution Approach 2:
The invention optimizes the rheological properties of the molten ink to achieve appropriate viscosity and flow characteristics that enable high-speed ejection through ink jet nozzles while maintaining stable flow patterns that prevent nozzle clogging during rapid printing cycles
3Manufacturing precision
If phase change ink composition is optimized for coated substrates, then image quality improves, but viscosity properties may affect jetting performance
Solution Approach 1:
The patent carefully adjusts the molecular structure parameters of the diamide compounds and the proportion of crystalline to amorphous components to achieve an optimal balance where the ink maintains solid form at room temperature for handling stability but transitions to a jettable liquid state at elevated temperatures with appropriate viscosity for ink jet operation
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 allows for improved image quality and reliability on coated substrates by maintaining a solid phase at room temperature and liquefying at elevated temperatures, reducing nozzle clogging and enabling high-speed printing without show-through on uncoated substrates.
Implementation Method 1
a phase change ink composition comprising a crystalline diamide compound with an aromatic core... characterized by being solid at room temperature and molten at an elevated temperature at which the molten ink is applied to a substrate
Implementation Method 2
the phase change ink is melted by the heater in the printing apparatus and utilized (jetted) as a liquid
Implementation Method 3
Upon contact with the printing recording medium, the molten ink solidifies rapidly, enabling the colorant to substantially remain on the surface of the recording medium
Data Source
AI summary
A phase change ink composition is disclosed. The composition comprises a crystalline component including a diamide compound with an aromatic ring core; an amorphous component; and optionally a colorant. Methods of printing the phase change ink composition are also disclosed.