Water-Soluble Transfer Sheet for Faster Recessed-Shape Formation
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Solution Overview
Problem
Existing transfer sheet technologies for forming recessed and projecting shapes on aircraft or automobile surfaces require lengthy washing times and are prone to cracking during the production process.
Innovation Solution
A transfer sheet comprising a water-soluble resin layer with a dissolving time of 0.2 s/μm to 1.0 s/μm in distilled water at 25°C, combined with a water-insoluble resin layer, to facilitate rapid washing and prevent cracking, using polyvinylalcohol and polyvinylpyrrolidone in specific ratios and incorporating a sliding layer and adhesive layer for improved handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a water-soluble resin layer is used to form recessed and projecting shapes on aircraft surfaces, then the shape formation accuracy on curved surfaces is improved, but the washing work time increases
Solution Approach 1:
The patent applies parameter changes by optimizing the molecular weight and composition of the water-soluble resin to achieve a specific dissolving time range (0.2 s/μm or more and 1.0 s/μm or less). This controlled parameter adjustment allows the resin to dissolve at an appropriate rate, balancing shape formation accuracy with reduced washing time. The water-soluble resin layer is designed with specific properties that enable it to maintain the recessed and projecting shape during application while dissolving efficiently during the washing process.
2Loss of time
If a water-soluble resin layer is used to form recessed and projecting shapes, then the washing work time can be reduced, but cracking occurs during the production process
Solution Approach 1:
The patent employs composite materials by combining the water-soluble resin layer with a water-insoluble resin layer in a stacked configuration. The water-soluble resin layer enables rapid washing with reduced time, while the water-insoluble resin layer provides structural support and prevents cracking during production and application. This composite structure allows each layer to fulfill its specific function, achieving both short washing time and high reliability without compromise.
3Loss of time
If the water-soluble resin dissolves too quickly, then the washing time is reduced, but the shape formation process is affected
Solution Approach 1:
The patent applies parameter changes by precisely controlling the dissolving time of the water-soluble resin within the range of 0.2 s/μm or more and 1.0 s/μm or less. This optimized parameter ensures that the resin dissolves at an appropriate rate during washing, neither too quickly nor too slowly. The controlled dissolving rate maintains shape formation quality by allowing sufficient time for proper adhesion and shape transfer, while still achieving reduced washing time through efficient dissolution.
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 solution significantly reduces washing time and inhibits cracking, enabling precise and efficient formation of recessed and projecting shapes on complex surfaces.
Implementation Method 1
a water-soluble resin layer that is formed of a water-soluble resin whose dissolving time in distilled water at 25° C. is 0.2 s/μm or more and 1.0 s/μm or less
Data Source
AI summary
[Object] To shorten the work time in the step of forming a water-insoluble resin layer having a recessed and projecting shape on a to-be-transferred body.[Solving Means] A transfer sheet (10) for forming a recessed and projecting shape includes: a water-soluble resin layer (20) that is formed of a water-soluble resin whose dissolving time in distilled water at 25° C. is 0.2 s/μm or more and 1.0 s/μm or less and includes recesses and projections on a first surface thereof; and a water-insoluble resin layer (30) that is stacked on the first surface.