Heat-Sensitive Transfer Sheet Receptor Layer Polymer Composition
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Solution Overview
Problem
Existing heat-sensitive transfer image-receiving sheets face challenges in achieving high sensitivity and excellent image preservability, particularly with the use of conventional polymers like polyester resins, polycarbonate resins, and vinyl chloride resins, which struggle to balance printing speed and image quality.
Innovation Solution
A heat-sensitive transfer image-receiving sheet with a receptor layer containing a specific polymer derived from a monomer represented by formula (1), which includes a repeating unit with a divalent linking group and an alkylene oxide chain, along with a copolymer structure incorporating a nitrile-series monomer, an aromatic vinyl monomer, and a (meth)acrylate unit, and a heat-insulation layer with hollow particles for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional polymers (polyester resins, polycarbonate resins, vinyl chloride resins) are used for the receptor layer, then the heat-sensitive transfer image-receiving sheet can be manufactured with basic functionality, but both high speed printing and excellent photographic properties (transfer sensitivity and image preservability) cannot be achieved simultaneously
Solution Approach 1:
The patent changes the chemical composition parameters of the receptor layer polymer by introducing a specific copolymer structure containing alkylene oxide chains (1-5 carbon atoms) combined with nitrile-series monomers and aromatic vinyl monomers. This specific compositional parameter change enables simultaneous achievement of high transfer sensitivity and excellent image preservability while maintaining printing speed performance.
Solution Approach 2:
The patent employs a composite polymer material system in the receptor layer, combining multiple monomer components (alkylene oxide chains, nitrile-series monomers, aromatic vinyl monomers) to create a copolymer that integrates the advantages of different polymer types. This composite approach resolves the contradiction by achieving both high-speed printing capability and excellent image quality through synergistic material properties.
2Reliability
If conventional polymers are used for the receptor layer, then manufacturing is straightforward, but high sensitivity and excellent image preservability cannot be achieved
Solution Approach 1:
The patent specifies precise parameter ranges for the polymer structure (alkylene oxide chains with 1-5 carbon atoms, specific monomer ratios) to optimize image preservability. By controlling these parameters within defined ranges, the patent achieves excellent reliability without requiring overly complex polymer synthesis processes.
3Reliability
If the receptor layer uses specific polymer structures to improve sensitivity, then transfer sensitivity increases, but the balance with printing speed and overall image quality deteriorates
Solution Approach 1:
The patent uses a composite copolymer material system that balances transfer sensitivity and printing speed. The combination of alkylene oxide chains, nitrile-series monomers, and aromatic vinyl monomers creates a material where each component contributes specific properties: alkylene oxide chains provide sensitivity, while the other components maintain processing speed and image quality, achieving overall balance.
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 enables the formation of a heat-sensitive transfer image-receiving sheet with enhanced sensitivity and image preservability, maintaining image quality and printing speed, as demonstrated by high relative transfer density and lightfastness in examples.
Implementation Method 1
a heat-sensitive transfer sheet (hereinafter also referred to as an ink sheet) containing dyes is superposed on a heat-sensitive transfer image-receiving sheet (hereinafter also referred to as an image-receiving sheet), and then the ink sheet is heated by a thermal head whose exothermic action is controlled by electric signals, in order to transfer the dyes contained in the ink sheet to the image-receiving sheet
Implementation Method 2
a heat-insulation layer with hollow particles for improved performance
Data Source
AI summary
A heat-sensitive transfer image-receiving sheet provided with at least one receptor layer on a support, wherein the receptor layer has a polymer containing a repeating unit derived from a monomer represented by formula (1); and a coating composition for forming the heat-sensitive transfer image-receiving sheet:wherein, R1 represents a hydrogen atom, a halogen atom or a methyl group; L1 represents a divalent linking group; R2 represents an alkylene group having 1 to 5 carbon atoms which may be further substituted; n represents an integer of 1 to 40; Z1 represents a hydrogen atom or a linear, branched or cyclic aliphatic hydrocarbon group having 1 to 30 carbon atoms which may be further substituted; and when n is 2 or more, R2s may be the same or different.