Sulfonated Block Copolymer Erasable Marking Surface
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Solution Overview
Problem
Current solutions for reusable marking surfaces are limited, as they often require specific inks or devices, and existing technologies do not allow for easy and convenient erasure of markings without specialized tools or fluids.
Innovation Solution
A laminate with a substrate coated in a sulfonated block copolymer outer layer, which enables markings to be erased with a wipe moistened with a cleaning fluid such as water, isopropyl alcohol, or acetone, allowing for repeated use without the need for specific inks or instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reusable marking surface is used, then the surface can be erased and reused, but it requires specific inks or specialized cleaning tools
Solution Approach 1:
The marking surface is designed to work with common marking materials (ballpoint pens, markers, crayons, paints) rather than requiring specialized inks. The sulfonated block copolymer coating enables the surface to be erased with common cleaning fluids like water, alcohol, or soap, making it universally compatible with everyday items rather than proprietary systems.
Solution Approach 2:
The surface coating itself provides the erasable property through its chemical structure. The sulfonated block copolymer interacts with marking materials and allows removal by common cleaning agents, meaning the surface serves its own erasing function without requiring specialized external tools or systems.
2Adaptability or versatility
If conventional marking surfaces are used, then markings can be made with any material, but the surface cannot be erased and reused
Solution Approach 1:
The sulfonated block copolymer coating changes the surface parameters (chemical composition, surface energy, porosity) to enable both compatibility with various marking materials and erasability. The specific polymer structure with sulfonate groups allows it to interact with different ink types while remaining removable by common cleaning fluids, thus resolving the contradiction between marking versatility and reusability.
3Productivity
If fast erasing is achieved, then the surface can be quickly reused, but it may require aggressive cleaning fluids or tools
Solution Approach 1:
The surface coating provides built-in erasability through its chemical structure, allowing quick removal of markings with mild, common cleaning fluids like water, alcohol, or soap. The sulfonated block copolymer's properties enable fast erasing without requiring aggressive chemicals or specialized tools, as the surface itself facilitates the erasing process.
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 sulfonated block copolymer laminate allows for at least 50% of markings to be erased within 5 minutes and up to 80% within 2 minutes, facilitating the reuse of the surface for various applications, including writing and painting, while also providing antimicrobial properties.
Implementation Method 1
The sulfonated block copolymer has an ion exchange capacity (IEC) of at least 0.5 meq/g
Implementation Method 2
At least 50% markings can be erased from the marking surface with a wipe moist with a cleaning fluid
Data Source
Figure 1A~1F
Figure 2A~2H
Figure 3A~3D
AI summary
An erasable laminate for marking is disclosed. The laminate comprises a substrate with a marking surface, allowing a user to provide markings on the marking surface using the marking material. The marking surface comprises an outer layer containing a sulfonated block copolymer having an ion exchange capacity (IEC) of > 0.5 meq/g. At least 50% of the markings can be erased from the marking surface with a wipe moist with a cleaning fluid (e.g., water, isopropyl alcohol, etc.) after wiping for less than 5 min. The laminate with erasable and reusable marking surface can be used for obtaining writing instruments, e.g., notebooks, artist easels, sketches, etc.