Ink Receiving Layer Cracking Prevention via Zirconium Compound
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Solution Overview
Problem
Recording media with ink receiving layers containing inorganic particles often suffer from cracking during drying, which reduces productivity and can lead to bronzing and decreased image density.
Innovation Solution
A recording medium with a substrate and multiple ink receiving layers, where the first layer contains fumed silica, alumina, and a zirconium compound in a specific mass ratio, and the second layer has fumed silica or alumina accounting for 80% of inorganic particles, reducing cracking and bronzing while maintaining high image density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drying temperature and dry air volume are reduced to prevent cracking, then crack occurrence is reduced, but productivity decreases
Solution Approach 1:
The patent changes the chemical composition parameters of the ink receiving layer by incorporating specific inorganic particles (silica, alumina, zirconium compound) in controlled ratios. This modifies the drying characteristics of the layer, allowing it to dry at higher temperatures and with greater air volume without cracking, thus resolving the contradiction between preventing cracks and maintaining productivity
Solution Approach 2:
The patent uses a composite material system consisting of multiple inorganic particles (silica, alumina, zirconium compound) combined in specific mass ratios. This composite structure provides both crack resistance and allows for efficient drying conditions, enabling high productivity without crack occurrence
2Quantity of substance
If inorganic particles are added to increase ink absorbency and image density, then ink absorbency and image density improve, but crack occurrence increases
Solution Approach 1:
The patent optimizes the particle size parameters and mass ratio parameters of the inorganic particles. By controlling the average particle size to be 1 μm or less and setting specific mass ratios (silica:alumina in 3:7 to 7:3, with zirconium compound at 0.1-5% by mass), the ink receiving layer achieves high ink absorbency while preventing crack formation during drying
Solution Approach 2:
The patent applies different inorganic particles with specific properties at different scales within the ink receiving layer. The combination of fine particles (for absorbency) and specific compositional ratios (for crack prevention) creates local quality variations that simultaneously achieve high ink absorbency and crack 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 solution effectively reduces cracking in the ink receiving layer, minimizes bronzing, and enhances image density by promoting aggregation of particles and interaction with the zirconium compound, resulting in improved ink absorbency and image quality.
Implementation Method 1
the occurrence of cracks in the ink receiving layer is reduced, and reducing bronzing... promotes aggregation of particles
Implementation Method 2
Recording media including an ink receiving layer containing inorganic particles are used from the viewpoint of increasing the ink absorbency thereof
Data Source
AI summary
A recording medium includes a substrate, and a first and a second ink receiving layer over the substrate in this order from the side close to the substrate. The first ink receiving layer contains fumed silica, alumina, and zirconium compound. In the first ink receiving layer, the mass ratio of the fumed silica to the alumina is in the range of 40:60 to 60:40. The zirconium compound content in the first ink receiving layer is in the range of 0.1% by mass to 3.0% by mass relative to the total mass of the first ink receiving layer. The second ink receiving layer contains inorganic particles including at least one of fumed silica and alumina. In the second ink receiving layer, the fumed silica or the alumina accounts for 80% by mass or more of the inorganic particles in the second ink receiving layer.