Thermal Inkjet Ink Composition for Decap and Drying Balance
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Solution Overview
Problem
Thermal inkjet printing faces issues with poor reliability due to decap behavior and static-induced nozzle clogging during high-volume printing operations, requiring a balance between decap time and drying time.
Innovation Solution
Inkjet inks comprising a terpene phenol resin and a specific compound, which provide extended decap times and quick drying properties, minimizing static-induced nozzle clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high boiling solvent systems are used to prevent solvent loss in uncapped printhead, then decap time is extended, but drying time increases and printing efficiency decreases
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink system by incorporating specific compounds (fatty acid amides and fatty alcohol polyglycol ethers) to change the solvent evaporation characteristics, achieving both extended decap time and rapid drying through optimized molecular structure and intermolecular forces
Solution Approach 2:
The patent creates a composite ink formulation combining terpene phenol resin with specific fatty acid amide compounds and fatty alcohol polyglycol ether compounds, where the synergistic interaction between components achieves both prolonged decap behavior and fast drying properties that neither component could achieve alone
2Productivity
If conventional inks are used during high volume printing operations, then printing speed is maintained, but static charge buildup causes nozzle clogging and print quality degradation
Solution Approach 1:
The patent introduces compound (B) as an intermediary substance that mediates between the ink components and the substrate, reducing static charge accumulation through its amphoteric properties and preventing solid ink component adhesion to nozzle surfaces during high-volume printing operations
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 inkjet inks achieve reliable print quality during high-volume operations by maintaining prolonged decap times and rapid drying, preventing nozzle clogging.
Implementation Method 1
the print cartridges contain a series of tiny chambers, each containing a heater, which produce ink droplets from thermal vaporization of an ink solvent. In the jetting process, a resistor is heated rapidly to produce a vapor bubble
Data Source
AI summary
An inkjet ink that includes (A) a terpene phenol resin and (B) a compound of formula (I) wherein R is an alkyl group having 8 to 22 carbon atoms or an alkenyl group having 8 to 22 carbon atoms, n is 0 or 1, p is an integer from 1 to 40, and q is an integer from 1 to 40. A printed article including the inkjet ink in dried form, and a method of forming a printed image with a thermal inkjet printhead are also provided.