Microcapsule Foam Recording Medium for Low-Temperature Stereoscopic Printing
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Solution Overview
Problem
Existing methods for forming stereoscopic images are insufficient in terms of speed, temperature requirements, and water resistance, particularly in applications where high-speed printing at low temperatures and exposure to water are necessary.
Innovation Solution
A recording medium comprising a substrate with a foam layer containing microcapsule-type foam particles, a water-insoluble thermoplastic resin, and polyvinyl alcohol, where the polyvinyl alcohol has specific saponification and polymerization degrees, and a controlled mass ratio with the thermoplastic resin, enhances foamability and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional foaming methods are used, then stereoscopic images can be formed, but high printing speed and low temperature operation cannot be achieved simultaneously
Solution Approach 1:
The patent changes the chemical parameters of the foaming system by selecting specific foamable resin types (polystyrene, polyacrylonitrile, polyvinylidene chloride) and controlling the plasticizer content (5-20 parts by mass per 100 parts foamable resin) and foamable resin content (5-50 mass%). These parameter changes enable the foaming reaction to proceed at lower temperatures while maintaining high printing speeds, resolving the contradiction between productivity and temperature requirements.
2Reliability
If conventional recording medium structures are used, then stereoscopic images can be formed, but sufficient water resistance cannot be achieved
Solution Approach 1:
The patent creates a composite material system consisting of foamable resin particles dispersed in a binder resin matrix. The binder resin acts as a water-resistant binding agent that holds the foamable resin particles together. This composite structure provides sufficient water resistance while maintaining a relatively simple single-layer recording medium structure, avoiding the need for complex multilayer constructions.
3Shape
If foamable resin content is increased to enhance foam height, then clear feeling of unevenness is improved, but manufacturing precision becomes difficult to control
Solution Approach 1:
The patent establishes precise parameter ranges for controlling foam characteristics: foamable resin content (5-50 mass%), plasticizer content (5-20 parts by mass per 100 parts foamable resin), and binder resin content (50-90 parts by mass per 100 parts foamable resin). These controlled parameters ensure that the foam height and unevenness feel can be optimized while maintaining manufacturing precision and consistency.
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
Enables high-speed stereoscopic image formation with a clear feeling of unevenness at low temperatures and excellent water resistance, improving productivity and durability.
Implementation Method 1
a foam layer provided on the substrate and containing a microcapsule-type foam particle that foams by heat
Implementation Method 2
polyvinyl alcohol, wherein the polyvinyl alcohol has a saponification degree of 70% or more and 92% or less and a polymerization degree of 1,000 or less
Data Source
Figure 1~2
Figure 3A~3C
AI summary
The recording medium (10) for stereoscopic image formation includes a substrate (11) and a foam layer (12) provided on the substrate (11) and containing a microcapsule-type foam particle (13) that foams by heat, a water-insoluble thermoplastic resin (14), and a polyvinyl alcohol (15). The thermoplastic resin (14) is dispersed in the foam layer (12) by a surfactant. The polyvinyl alcohol (15) has a saponification degree of 70% or more and 92% or less and a polymerization degree of 1,000 or less. The mass ratio of the content (mass%) of the polyvinyl alcohol (15) to the content (mass%) of the thermoplastic resin (14) in the foam layer (12) is 0.10 or more and 0.40 or less.