Thermal Transfer Sheet With Siloxane Primer for Wrinkle Prevention
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Solution Overview
Problem
Existing thermal transfer sheets experience elongation and wrinkle issues during high temperature printing due to insufficient heat resistance and adhesion in the back face layer, leading to printing suitability problems.
Innovation Solution
A thermal transfer sheet with a siloxane cross-linked acrylic resin back face primer layer between the substrate and back face layer, providing enhanced heat resistance and adhesion to prevent elongation and wrinkle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher energy is applied on a thermal transfer sheet per unit time to increase printing speed, then productivity is improved, but elongation occurs in the substrate causing wrinkles and printing quality deteriorates
Solution Approach 1:
A back face primer layer is introduced as an intermediary between the substrate and the back face layer. This primer layer contains a siloxane cross-linked acrylic resin that provides enhanced adhesion and heat resistance, acting as a mediator that prevents elongation propagation from the substrate to the back face layer during high-energy printing, thereby maintaining printing quality while enabling higher printing speeds
Solution Approach 2:
The back face primer layer utilizes a composite material system consisting of siloxane cross-linked acrylic resin combined with specific binders and additives. This composite formulation provides both the adhesion strength and thermal stability required to suppress substrate elongation effects during high-temperature printing, resolving the contradiction between printing speed and printing quality
2Temperature
If a back face layer is provided on the other face of the substrate to improve heat resistance, then temperature resistance is improved, but elongation of constituent members still occurs leading to wrinkles
Solution Approach 1:
The back face primer layer serves as a critical intermediary between the substrate and the back face layer. This primer layer contains a siloxane cross-linked acrylic resin that provides superior adhesion strength, preventing the back face layer from detaching or deforming during thermal printing processes, thereby maintaining printing quality while providing the necessary heat resistance
Solution Approach 2:
The invention changes the chemical and physical parameters of the primer layer by using siloxane cross-linked acrylic resin with specific molecular weight, cross-linking density, and thermal stability characteristics. These parameter changes enable the primer layer to maintain its structural integrity and adhesion properties at high temperatures, preventing elongation-related defects while providing heat 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 sheet maintains good printing suitability on high temperature printing by suppressing loosening and maintaining adhesion, preventing wrinkles and improving printer performance.
Implementation Method 1
the back face primer layer contains a siloxane cross-linked acrylic resin
Data Source
Figure 1~3
AI summary
Provided is a thermal transfer sheet enabling printing suitability on high temperature printing to be good. A thermal transfer sheet 100 in which either one or both of a colorant layer 3 and a transfer layer 10 are provided on one face of a substrate 1, and a back face layer 20 is provided on the other face of the substrate 1, wherein a back face primer layer 25 is provided between the substrate 1 and the back face layer 20, and the back face primer layer 25 contains at least one component selected from a silicone resin, a siloxane cross-linked resin, and a silica-introduced resin.