Thermal Transcription Sheet Receiving Layer Composition
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Solution Overview
Problem
Existing thermal transcription sheets face challenges in achieving high printing density, adhesion performance, and preventing image bleeding or fading, especially under high temperature conditions, due to limitations in the receiving layer composition and properties.
Innovation Solution
A sheet for thermal transcription is developed with a receiving layer containing a graft polymer of acrylic or methacrylic monomers and polyester, which improves detachment performance, adhesion, and printing density, while preventing image bleeding and fading, by optimizing the ratio and reactivity of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only acrylic resin is used as the receiving layer, then detachment performance is optimal, but printing density is insufficient
Solution Approach 1:
The receiving layer uses a composite resin system combining acrylic resin (5-50 wt%) and polyester resin (50-95 wt%), creating a material that integrates the detachment performance benefits of acrylic with the high dyeability and adhesion properties of polyester, resolving the contradiction between easy detachment and high printing density
2Manufacturing precision
If only polyester is used as the receiving layer, then printing density is sufficient, but running performance under high temperature deteriorates
Solution Approach 1:
The invention modifies the chemical composition parameters of the receiving layer by incorporating acrylic resin components that provide thermal stability and controlled reactivity, allowing the layer to maintain its high dyeability while exhibiting improved resistance to external stress and cracking under high temperature conditions
3Manufacturing precision
If the receiving layer is softened excessively to improve printing density, then dye diffusion is sufficient, but image bleeding occurs under high temperature
Solution Approach 1:
The receiving layer exhibits spatially differentiated properties through its composite composition: the polyester component provides localized softening and dye diffusion capability for high printing density, while the acrylic component creates regions of thermal stability that prevent excessive dye migration and image bleeding under high temperature storage conditions
4Reliability
If the receiving layer is softened excessively to improve light fastness, then transfer properties improve, but detachment performance deteriorates
Solution Approach 1:
The invention adjusts the glass transition temperature and molecular weight parameters of the polyester resin component, and optimizes the acrylic-to-polyester ratio, to achieve a receiving layer that is sufficiently soft for good dye reception and light fastness while maintaining adequate detachment performance through the thermal stability contribution of the acrylic resin
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 high-quality, high-resolution images with stable running performance and improved light fastness, preventing image deterioration and bleeding, even under high temperature conditions.
Implementation Method 1
a receiving layer formed on the substrate to receive thermally transferred dyes
Implementation Method 2
a receiving layer containing a graft polymer of at least one monomer out of acrylic monomers and methacrylic monomers, and at least one polyester sort
Implementation Method 3
preventing image deterioration and bleeding, even under high temperature conditions
Data Source
AI summary
A sheet for thermal transcription including a substrate (2) and a receiving layer (3) formed on the substrate (2) for receiving a dye. The receiving layer (3) contains a graft polymer of at least one monomer out of acrylic monomers and methacrylic monomers and at least one polyester sort. The sheet for thermal transcription assures satisfactory printing density and satisfactory adhesion performance with respect to a laminate film, while preventing image bleeding or fading and assuring stabilized running performance. Thus, it is possible to generate an image of high quality and high resolution.