Recording medium and method for producing recorded matter having three-dimensional image
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Solution Overview
Problem
Existing methods for forming three-dimensional images with clear unevenness are limited in their ability to efficiently express detailed surface features, due to issues with foam distribution and temperature control.
Innovation Solution
A recording medium comprising a substrate and a foaming layer containing a foaming material and a binder resin, where the foaming layer has a specific contact angle and water droplet expansion ratio, allowing for improved permeation of a foam-promoting liquid and enhanced foamability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thermal expansion sheet is used to form three-dimensional images, then the images can be formed with varying heights, but the surface unevenness and clarity are insufficient
Solution Approach 1:
The patent applies porous foamable capsules containing gas or vaporizable liquid inside a resin matrix. When heated, these capsules expand to create controlled porous structures that form three-dimensional images with clear surface unevenness. The porous nature allows for better light scattering and visual clarity while maintaining shape definition.
Solution Approach 2:
The invention uses composite material structure combining foamable capsules (containing gas or vaporizable liquid) embedded in a resin matrix. This composite approach allows the material to exhibit both structural integrity from the resin and expansion capability from the capsules, achieving clear three-dimensional surface features.
2Shape
If foamable capsules with plasticizer are used, then three-dimensional images can be formed, but the foam distribution and temperature control are insufficient
Solution Approach 1:
The patent specifies precise parameter ranges: foamable capsule content (5-90 mass%), resin content (10-95 mass%), glass transition temperature (0-100°C), and foaming start temperature (80-150°C). These controlled parameters ensure uniform foam distribution and proper temperature control during the foaming process, achieving consistent three-dimensional image quality.
3Productivity
If conventional recording media are used, then images can be produced, but the detailed surface features and image quality are limited
Solution Approach 1:
The patent incorporates foamable capsules pre-filled with gas or vaporizable liquid into the resin matrix before final image formation. This preliminary preparation allows the material to be ready for controlled expansion, enabling efficient production of high-quality three-dimensional images with detailed surface features when heated.
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 proposed solution enables the formation of three-dimensional images with clear unevenness by optimizing foam distribution and temperature control, resulting in improved image quality and efficiency.
Implementation Method 1
a foaming layer being provided on the substrate and containing a foaming material which foams with heat
Implementation Method 2
containing a foaming material which foams with heat and a binder resin
Data Source
AI summary
A recording medium for producing a recorded matter having a three-dimensional image comprises: a substrate; and a foaming layer being provided on the substrate and containing a foaming material which foams with heat and a binder resin. A contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 80° or less, and a ratio of a diameter of a water droplet 30 seconds after the water is brought into contact with the surface of the foaming layer to a diameter of the water droplet 0.01 seconds after the water is brought into contact with the surface of the foaming layer is 1.3 times or less.