Nonionic Resin Processing Fluid for Coated Paper Abrasion Resistance
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Solution Overview
Problem
Existing printing methods for coated paper and paper board with low absorption properties suffer from inadequate abrasion resistance, leading to ink detachment during processes like cutting and transport, which requires enhanced adhesion and fixability between the processing fluid and ink layers.
Innovation Solution
Incorporating a first nonionic resin with a glass transition temperature of 15 degrees C. or lower in both the processing fluid and ink, along with a cationic resin and multivalent metal salt, to improve adhesion and abrasion resistance, ensuring the ink is not detached by friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional ink and processing fluid are used on coated paper and paper board with low absorption properties, then the printing process can be completed, but the abrasion resistance is inadequate and ink detachment occurs during cutting and transport
Solution Approach 1:
The patent changes the chemical parameters of the processing fluid and ink by introducing a specific polymer composition with glass transition temperature of 15°C or lower. This parameter change enhances the adhesion between the processing fluid and ink layers, preventing ink detachment during mechanical processes like cutting and transport, thereby resolving the contradiction between abrasion resistance and ink attachment stability
Solution Approach 2:
The patent employs a composite material system consisting of processing fluid and ink containing specific polymers (including polyurethane and polyester polymers). This composite material approach creates a synergistic effect where the polymer components in both fluids work together to enhance adhesion and fixability, ensuring the ink remains attached even under mechanical stress
2Strength
If the glass transition temperature of the nonionic resin is reduced to 15 degrees C. or lower, then adhesion and compatibility between processing fluid and ink are enhanced, but the formulation complexity increases
Solution Approach 1:
The patent establishes a clear parameter threshold (glass transition temperature of 15°C or lower) for the nonionic resin to achieve enhanced adhesion. By defining this specific parameter range, the patent simplifies the formulation process rather than increasing complexity, as manufacturers can select resins based on this straightforward criterion
Solution Approach 2:
The patent applies different polymer components with specific properties to different functional requirements: the nonionic resin with low glass transition temperature provides adhesion, while the cationic resin and multivalent metal salt handle other aspects of ink fixation. This local quality approach allows each component to be optimized independently, managing formulation complexity through functional specialization
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 enhances the compatibility and adhesion between the processing fluid and ink layers, significantly improving abrasion resistance and preventing ink detachment, even under mechanical stress like fingernail scratches.
Implementation Method 1
the first nonionic resin having a glass transition temperature of 15 degrees C. or lower
Implementation Method 2
an ink containing a second nonionic resin including the following structure unit a-1 and a coloring material
Implementation Method 3
a cationic resin and multivalent metal salt
Data Source
AI summary
A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C. or lower, wherein the ink contains a second nonionic resin including the following structure unit a-1 and a coloring material