Phase Change Ink Esters for Coated Paper Image Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional phase change ink technologies are not satisfactory for printing on coated paper substrates, lacking the ability to produce excellent image quality on these surfaces.
Innovation Solution
A phase change ink composition comprising a mixture of an ester of tartaric acid and an ester of citric acid, with a glass transition temperature ranging from −20° C. to 50° C., which forms the basis of an amorphous material used in the ink, combined with a crystalline component and optional colorants, to create robust and high-quality prints on coated papers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional phase change ink technologies are used, then the ink can be applied to substrates, but the image quality on coated paper substrates is not satisfactory
Solution Approach 1:
The patent modifies the chemical composition parameters of the phase change ink by incorporating specific ester compounds (ester of tartaric acid and ester of citric acid) with controlled molecular structures and ratios. This changes the rheological parameters and surface tension of the ink, enabling it to perform adequately on coated paper substrates while maintaining high image quality.
Solution Approach 2:
The patent creates a composite ink formulation by combining multiple components: ester of tartaric acid, ester of citric acid, and other compatible substances in specific proportions. This composite approach allows the ink to exhibit both the phase change properties needed for inkjet printing and the surface interaction properties required for coated paper, resolving the contradiction between image quality and substrate compatibility.
2Ease of operation
If the glass transition temperature is lowered to improve flowability, then the ink flows more easily, but the resistance to scratches is reduced
Solution Approach 1:
The patent optimizes the glass transition temperature parameter within a specific range (−50°C to 0°C) by selecting appropriate ester compounds and their ratios. This controlled parameter change achieves sufficient flowability for inkjet printing while maintaining adequate scratch resistance through the specific molecular structure and intermolecular forces of the ester compounds.
Solution Approach 2:
The patent creates different functional zones within the ink formulation: the ester of tartaric acid provides structural integrity and scratch resistance, while the ester of citric acid contributes to flowability and surface wetting. This local differentiation of functional properties within the composite material resolves the contradiction between flowability and scratch resistance.
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 amorphous material with a specific glass transition temperature range provides robust and high-quality prints on coated papers, offering improved rheological profiles and resistance to scratches, enhancing the reliability and image quality of inkjet printing on previously challenging substrates.
Implementation Method 1
phase change ink compositions which are characterized by being solid at room temperature (e.g., 20-27° C.) and molten at an elevated temperature
Implementation Method 2
the molten ink solidifies rapidly, enabling the colorant to substantially remain on the surface of the recording medium instead of being carried into the recording medium (for example, paper) by capillary action
Data Source
AI summary
The disclosure provides amorphous materials comprising mixtures of ester of tartaric acid and ester of citric acid, which are suitable for phase change inks.