Ink-Receiving Layer Ozone Resistance and Color Development
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Solution Overview
Problem
Existing recording media with ink-receiving layers containing inorganic particles and binders face challenges in achieving both high ozone resistance and color development, as previous solutions either compromise on ozone resistance or color development due to issues with dispersion stability and layer structure.
Innovation Solution
A recording medium with an ink-receiving layer comprising inorganic particles, poly(diallyldimethylamine hydrochloride), a cationic polymer having a sulfonyl group, and a polyvalent metal, which synergistically enhance ozone resistance and color development by improving dispersion stability and association with coloring materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an ink-receiving layer contains inorganic particles and a binder, then color development and glossiness are improved, but ozone resistance deteriorates
Solution Approach 1:
The patent applies local quality by creating a layered structure where the lower layer contains cationic polymer for ozone resistance while the upper layer provides color development. Different regions of the ink-receiving layer have different compositions optimized for their specific functions, resolving the contradiction between color development and ozone resistance.
Solution Approach 2:
The patent uses composite materials by combining cationic polymers (poly(allylamine hydrochloride), poly(methyldiallylamine hydrochloride), or diallylamine hydrochloride-sulfur dioxide copolymer) with inorganic particles and binders in a multi-layer structure. This composite approach allows simultaneous achievement of ozone resistance and color development that single materials cannot provide.
2Object-affected harmful factors
If a cationic polymer is added to improve ozone resistance, then ozone resistance is improved, but color development deteriorates
Solution Approach 1:
The patent segments the ink-receiving layer into multiple layers with distinct functions. The lower layer contains the cationic polymer primarily for ozone resistance, while the upper layer is optimized for color development. This segmentation allows each layer to perform its specific function without compromising the other, resolving the contradiction between ozone resistance and color development.
3Illumination intensity
If inorganic particles are used to improve color development, then color development is improved, but dispersion stability deteriorates
Solution Approach 1:
The patent uses cationic polymers as intermediary substances that improve the dispersion stability of inorganic particles. The cationic polymer acts as a dispersant that prevents particle aggregation, ensuring stable dispersion of inorganic particles throughout the ink-receiving layer while maintaining their contribution to color development and glossiness.
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 combination of these components results in a recording medium with excellent ozone resistance and color development, outperforming previous solutions by stabilizing inorganic particles and enhancing the ink-receiving layer's transparency and image quality.
Implementation Method 1
a cationic polymer having a sulfonyl group, and a polyvalent metal, which synergistically enhance ozone resistance and color development by improving dispersion stability and association with coloring materials
Implementation Method 2
A recording medium having an ink-receiving layer constituted of inorganic particles and a binder is excellent in color development and glossiness of an image
Data Source
AI summary
A recording medium includes a base and an ink-receiving layer. The ink-receiving layer includes inorganic particles, a binder, poly(diallyldimethylamine hydrochloride), a cationic polymer having a sulfonyl group, and a polyvalent metal.