Continuous Inkjet Ink Composition for Retort-Resistant Printing
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Solution Overview
Problem
Existing continuous type inkjet ink compositions used in retort pouch food products face issues with colorant elution and whitening during high-temperature retort sterilization, leading to poor retort resistance and maintainability due to the use of conventional dyes and conductivity agents.
Innovation Solution
A continuous type inkjet ink composition containing an organic dye with a disazo backbone and a conductivity imparting agent with anionic elements of phosphorus or boron, along with a resin and organic solvent, is formulated to enhance retort resistance and maintain ink integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional colorants and conductivity agents are used in continuous type inkjet ink composition, then the ink composition can be formulated with standard components, but the colorant is eluted and the printed matter is whitened during retort sterilization treatment
Solution Approach 1:
The patent changes the chemical structure parameters of the conductivity agent by specifying that the anionic portion must contain phosphorus or boron elements. This parameter change transforms the conductivity agent into a form that resists whitening during retort sterilization while maintaining its electrical conductivity function.
Solution Approach 2:
The patent creates a composite ink composition system that combines specific dye types with the newly defined conductivity agents containing phosphorus or boron. This composite approach ensures that both the colorant and conductivity agent work together to provide retort resistance without elution or whitening.
2Stability of the object's composition
If pigment is used as colorant in continuous type inkjet ink composition, then the ink composition has good stability, but the colorant is not easily dissolved in the organic solvent and has solid-liquid phase interface issues
Solution Approach 1:
The patent changes the physical state parameter of the colorant from solid (pigment) to dissolved form (dye). By specifying that the colorant must be a dye that is easily dissolved in the organic solvent, the patent eliminates the solid-liquid phase interface problems that cause nozzle clogging while maintaining composition stability.
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 composition effectively prevents dye elution and conductivity agent whitening during retort sterilization, ensuring high printing quality and reliability of the printed matter.
Implementation Method 1
the conductivity imparting agent is an ionic compound having, at an anionic portion thereof, at least one element selected from the group consisting of phosphorus and boron
Implementation Method 2
the dye is an organic dye having a disazo backbone, and by such a structure, the contained dye is hardly eluted from the printed matter even under the retort sterilization treatment
Data Source
AI summary
This continuous type inkjet ink composition contains a dye, a resin, an electrical conductivity imparting agent, and an organic solvent. The dye is an organic dye having a disazo backbone. The electrical conductivity imparting agent is an ionic compound having, at an anionic portion thereof, at least one element selected from the group consisting of phosphorus and boron. The continuous type inkjet ink composition causes the contained dye to be dissolved therein, and enables obtaining of a printed matter having excellent retort resistance.