UV-Resistant Heat-Sensitive Adhesive Medium
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Solution Overview
Problem
Conventional laminated media using heat-sensitive and adhesive media are prone to poor colorfastness due to sensitivity to ultraviolet light, as the heat-sensitive layer is exposed to UV light twice through incident and reflected light, leading to deterioration.
Innovation Solution
A medium is developed with a heat-sensitive layer and an adhesive layer, where the adhesive medium has higher ultraviolet absorbance than the base material, reducing exposure of the heat-sensitive layer to UV light by absorbing UV light in reflected rays, thus enhancing UV resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat-sensitive layer is exposed to UV light through incident and reflected light, then the printing function is achieved, but the colorfastness deteriorates due to UV sensitivity
Solution Approach 1:
The adhesive medium serves as an intermediary layer between the heat-sensitive medium and the external environment. It absorbs UV light through its base material, preventing UV radiation from reaching the heat-sensitive layer. This mediator approach directly addresses the contradiction by introducing a protective function without compromising the printing capability.
Solution Approach 2:
The adhesive medium's base material is selected to have high UV absorbance, converting the potentially harmful UV radiation into heat through absorption. This beneficial effect protects the heat-sensitive layer from UV-induced deterioration while the adhesive function remains intact.
2Reliability
If the adhesive medium has high UV absorbance, then UV resistance is improved, but the transparency may be affected
Solution Approach 1:
The base material of the adhesive medium is specifically selected with UV absorbance greater than that of the heat-sensitive medium's base material. This parameter optimization allows the adhesive medium to absorb UV light while maintaining sufficient transparency for the printing function to proceed effectively.
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 medium achieves high resistance to UV light, reducing deterioration of the heat-sensitive layer and maintaining colorfastness, allowing for the creation of a laminated medium with improved UV resistance.
Implementation Method 1
The adhesive medium has an ultraviolet absorbance greater than an ultraviolet absorbance of the first base material
Data Source
AI summary
A medium includes a heat-sensitive medium and an adhesive medium. The heat-sensitive medium includes a first base material and a first heat-sensitive layer. The first base material has a transparency. The first heat-sensitive layer has a transparency. The first heat-sensitive, layer is provided on one surface of the first base material. The first heat-sensitive layer is configured to develop a first color when heated to a first temperature or higher. The adhesive medium includes a second base material and a first adhesive layer. The first adhesive layer is provided on one surface of the second base material. The heat-sensitive medium and the adhesive medium are to be superimposed such that the first heat-sensitive layer and the first adhesive layer are interposed between the heat-sensitive medium and the adhesive medium. The adhesive medium has an ultraviolet absorbance greater than an ultraviolet absorbance of the first base material.