Vinyl Chloride–Vinyl Acetate Peel-Off Sheet for Low-Energy Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal transfer methods face challenges in forming images on irregularly shaped surfaces and may cause wrinkles or ruptures in the intermediate transfer medium due to high energy heating, necessitating a peel-off sheet with improved peel-off properties for selective transfer layer removal.
Innovation Solution
A peel-off sheet comprising a first substrate and a peel-off layer made of vinyl chloride-vinyl acetate copolymer and crystalline polyester, with a logarithmic damping ratio of 0.25 or more, and optionally containing particles, enhances the peel-off property, allowing transfer layer removal with reduced energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating with a thermal head is performed with a large amount of energy to remove the transfer layer, then the peel-off property is improved, but wrinkles are formed in the transfer layer and the intermediate transfer medium ruptures
Solution Approach 1:
The patent changes the material parameters of the peel-off layer by using a vinyl chloride-vinyl acetate copolymer with specific composition ratios (vinyl chloride 30-70 parts, vinyl acetate 30-70 parts) and controlling the glass transition temperature (50-90°C) and melting point (70-150°C). These parameter changes enable the peel-off layer to achieve excellent peel-off properties with low energy heating, preventing wrinkles and rupture in the transfer layer and intermediate transfer medium.
Solution Approach 2:
The patent creates a composite peel-off layer by combining vinyl chloride-vinyl acetate copolymer with specific additives and controlling the molecular weight distribution. This composite material structure provides both good peel-off performance and resistance to deformation under heat, allowing selective transfer layer removal without damaging the intermediate transfer medium.
2Object-affected harmful factors
If heating with a thermal head is performed with a small amount of energy to avoid wrinkles, then the intermediate transfer medium is protected, but the peel-off property is insufficient
Solution Approach 1:
The patent optimizes the material parameters of the peel-off layer, specifically using a vinyl chloride-vinyl acetate copolymer with glass transition temperature (50-90°C) and melting point (70-150°C), to achieve effective peeling at low temperatures. This allows the transfer layer to be removed with minimal energy, preventing wrinkle formation while maintaining excellent peel-off properties.
3Device complexity
If a conventional peel-off layer material is used, then the structure is simple, but the peel-off property is insufficient and high energy is required
Solution Approach 1:
The patent employs a composite peel-off layer material consisting of vinyl chloride-vinyl acetate copolymer with specific composition ratios and controlled molecular weight distribution. This composite material provides superior peel-off properties compared to simple materials, enabling effective transfer layer removal with low energy input while maintaining reasonable structural complexity.
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 peel-off sheet enables efficient and wrinkle-free removal of the transfer layer from the intermediate transfer medium, even with low energy heating, ensuring high peel-off performance and maintaining image quality.
Implementation Method 1
they are heated with a thermal head or the like included in a thermal transfer printer to be thermocompression-bonded to each other
Implementation Method 2
heating the thermal transfer sheet with a thermal head included in a thermal transfer printer
Data Source
AI summary
The peel-off sheet according to the present disclosure includes a first substrate and a peel-off layer, wherein the peel-off layer contains a vinyl chloride-vinyl acetate copolymer and a crystalline polyester, or the peel-off sheet includes a structural component containing particles, wherein the particle size distribution of the particles contained in the structural component which is determined with a laser diffraction scattering particle size distribution analyzer has a maximum peak at a position of more than 0.2 μm and 5 μm or less.