Ink Jet Recording Medium UV Absorber Silica Ratio
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Solution Overview
Problem
Conventional ink jet recording media fail to simultaneously achieve high color developability and light resistance, especially when using dye inks, and existing solutions do not meet the requirements for high-grade applications like fine art papers.
Innovation Solution
An ink jet recording medium with a base material and an ink receiving layer containing wet silica, a binder, an ultraviolet absorber represented by a specific general formula, and a polyoxyalkylene alkyl ether surfactant, where the ultraviolet absorber content is between 10 to 20 parts by mass per 100 parts of wet silica, enhancing light resistance and color developability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ultraviolet absorber is added to the ink receiving layer to improve light resistance, then light resistance is improved, but color developability deteriorates
Solution Approach 1:
The patent optimizes the content ratio of ultraviolet absorber to wet silica to 1:10 to 1:20, and specifies the surfactant type as polyoxyalkylene alkyl ether. These parameter changes enable the ink receiving layer to achieve both light resistance and color developability simultaneously, resolving the contradiction between these two properties.
Solution Approach 2:
The patent introduces a surfactant as an intermediary substance that facilitates the uniform dispersion of ultraviolet absorber in the ink receiving layer. The surfactant acts as a mediator between the ultraviolet absorber and wet silica, enabling compatible interaction that maintains both light resistance and color developability without one property compromising the other.
2Reliability
If the ultraviolet absorber content is increased to improve light resistance, then light resistance is improved, but transparency of the ink receiving layer deteriorates
Solution Approach 1:
The patent precisely controls the ultraviolet absorber content within the range of 10-20 parts by mass per 100 parts of wet silica. This parameter optimization ensures sufficient light resistance while maintaining transparency, as higher concentrations would compromise the transparency required for high-quality image recording.
3Reliability
If conventional ultraviolet absorbers are used to achieve light resistance, then light resistance is improved, but color developability remains insufficient for high-grade applications
Solution Approach 1:
The patent creates a composite ink receiving layer system combining wet silica, binder, specifically formulated ultraviolet absorber (formula 1), and polyoxyalkylene alkyl ether surfactant. This composite material approach enables synergistic effects where each component contributes to both light resistance and color developability, achieving performance suitable for high-grade applications like fine art papers.
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 proposed solution significantly improves the light resistance and color developability of images, making the recording medium suitable for high-grade applications, such as fine art papers, by efficiently absorbing ultraviolet rays and maintaining transparency.
Implementation Method 1
an ultraviolet absorber represented by the following general formula (1)... efficiently absorbing ultraviolet rays
Implementation Method 2
the surfactant is a polyoxyalkylene alkyl ether... improving color developability
Data Source
AI summary
There is provided an ink jet recording medium capable of recording images excellent in color developability and light resistance. The ink jet recording medium has a base material and an ink receiving layer provided on the base material. The ink receiving layer contains a wet silica, a binder, an ultraviolet absorber represented by the following general formula (1) (wherein R1 represents a hydrogen atom or a halogen atom; R2 and R3 each independently represent a hydrogen atom, an alkyl group, an alkyl group containing an ester group, or an alkylphenyl group), and a surfactant; in the ink receiving layer, the content of the ultraviolet absorber with respect to 100 parts by mass of the wet silica is 10 parts by mass or more and 20 parts by mass or less; and the surfactant is a polyoxyalkylene alkyl ether.