Polishing Sheet with Dual Abrasive Grains for Water Scale Removal
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Solution Overview
Problem
Conventional polishing tools and methods fail to effectively remove stubborn, squamous water scale from mirrors and glasses without damaging the surface, as they often require high force and can lead to scratches.
Innovation Solution
A polishing sheet with convex portions and a dual abrasive grain structure, where softer first abrasive grains are placed on the convex surfaces and harder second abrasive grains are on the sheet surface, allowing for efficient removal of water scale with reduced risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sand paper with hard abrasive grains (alumina, silica, zirconia) is used to remove water scale, then the water scale can be removed, but the surface of the mirror or glass is damaged (scratches and scars occur)
Solution Approach 1:
The polishing sheet applies local quality by providing different abrasive grain hardnesses at different locations: harder abrasive grains (second abrasive grains) are embedded in the sheet surface for effective water scale removal, while softer abrasive grains (first abrasive grains) are placed on convex portions that contact the glass surface for gentle polishing. This spatial differentiation of material properties allows simultaneous achievement of strong cutting ability and surface protection.
2Force
If a very large force is applied to polish squamous water scale with conventional polishing sheets, then the polishing action is intensified, but the squamous water scale is not removed and the glass surface may be damaged
Solution Approach 1:
The invention changes the hardness parameter of abrasive grains by providing two distinct types: softer first abrasive grains on convex portions for safe contact with glass, and harder second abrasive grains in the sheet surface for effective water scale removal. This parameter differentiation allows the system to achieve effective cutting without requiring excessive force that would damage the substrate.
3Device complexity
If conventional polishing sheets with uniform abrasive grains are used, then the structure is simple, but they cannot effectively remove squamous water scale without damaging the glass surface
Solution Approach 1:
The polishing sheet is segmented into two functional zones: convex portions covered with softer first abrasive grains for gentle glass surface contact, and flat sheet surface areas with harder second abrasive grains for aggressive water scale removal. This segmentation allows each zone to perform its specific function optimally, achieving both effectiveness and safety.
Solution Approach 2:
The polishing sheet uses composite materials by combining two types of abrasive grains with different hardness properties in a single sheet structure. The softer first abrasive grains (e.g., cerium oxide) and harder second abrasive grains (e.g., alumina, silica, or zirconia) work together to provide both cutting power and surface protection, creating a composite polishing system.
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 rapid and efficient removal of water scale with minimal force, reducing the likelihood of scratches or scars on the mirror or glass surfaces, improving work efficiency by one-third compared to conventional methods.
Implementation Method 1
a plurality of first abrasive grains provided on upper surfaces of the convex portions, and a plurality of second abrasive grains provided on the surface of the sheet. The second abrasive grains each have hardness higher than that of the first abrasive grains.
Data Source
AI summary
A polishing sheet includes a sheet including one side having a surface, a plurality of convex portions provided to project from the surface of the one side of the sheet, a plurality of first abrasive grains provided on an upper surface of each of the convex portions, and a plurality of second abrasive grains provided on the surface of the sheet. The second abrasive grains each have hardness higher than that of the first abrasive grains.