Phase Change Ink Spreading Prediction via Static Force
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Solution Overview
Problem
The challenge in predicting the spreading performance of phase change inks during the print process is significant, as most inks rely on a trial and error approach due to a lack of understanding of the physical properties that contribute to good spreading, with only a few, like Xerox 8560 wax-based inks, meeting specifications.
Innovation Solution
A phase change ink composition comprising a crystalline and amorphous component, exhibiting specific mechanical properties such as a static force between 2 N and 4.5 N and a storage modulus between 300 MPa and 700 MPa at temperatures ranging from 40° C. to 80° C., along with a method to predict spreading performance by determining if the ink's static force and storage modulus fall within desired ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trial and error approach is used to develop phase change inks, then some inks may eventually meet spreading specifications, but the process is inefficient and time-consuming with poor understanding of underlying physical properties
Solution Approach 1:
The patent replaces the mechanical trial-and-error approach with a predictive model based on measuring static force and storage modulus. By using these mechanical property measurements at specific temperatures, the invention substitutes iterative experimentation with a systematic prediction method that identifies inks with acceptable spreading performance before full printing tests are conducted.
Solution Approach 2:
The invention changes the parameters used to evaluate ink spreading from empirical printing results to fundamental mechanical properties (static force and storage modulus). By monitoring these specific parameters at controlled temperatures (40-80°C), the patent enables prediction of spreading behavior without requiring actual printing trials, thus reducing development time while maintaining reliability assessment.
2Measurement precision
If extensive experimental work is conducted to improve ink properties, then properties like scratch resistance, fold offset, and solidification rate can be predicted, but spreading ability remains difficult to predict due to poor understanding of physical properties
Solution Approach 1:
The patent introduces static force and storage modulus measurements as intermediary properties that mediate between the ink's physical composition and its spreading behavior. These intermediary measurements at specific temperatures serve as proxies that are easier to measure and control directly, while still providing accurate prediction of the difficult-to-measure spreading property during the printing process.
3Reliability
If only a few wax-based inks like Xerox 8560 are used, then acceptable spreading performance is achieved, but the selection is limited and lacks versatility
Solution Approach 1:
The patent creates a universal prediction method that can evaluate any phase change ink formulation, not just wax-based inks. By establishing criteria based on static force and storage modulus measurements, the invention provides a multi-functional tool that works across different ink types and compositions, enabling versatile ink selection while maintaining reliable spreading performance prediction.
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
This approach allows for the identification of phase change inks with acceptable spreading performance, enabling the development of novel inks that meet specifications and providing a method to predict spreading ability, reducing reliance on trial and error.
Implementation Method 1
phase change ink compositions and a method of determining whether phase change ink compositions will have desired spreading characteristics
Data Source
AI summary
A phase change ink composition is disclosed. The phase change ink composition comprises a crystalline component and an amorphous component. At a temperature ranging from about 40° C. to about 80° C., the phase change ink simultaneously exhibits (i) a static force ranging from about 2 N to about 4.5 N, and (ii) a storage modulus ranging from about 300 MPa to about 700 Mpa. The crystalline component is not a wax. A method of predicting spreading performance of a phase change ink is also disclosed.