Structured Abrasive With Erosive Overlayer for Powder Clear Coat Finishing
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Solution Overview
Problem
Structured abrasive articles often lack aggressive cut initially due to abrasive particles being buried in the binder, requiring a separate conditioning step, and struggle with surface finishing of powder clear coats.
Innovation Solution
A structured abrasive article with a topographically structured abrasive layer comprising precisely-shaped abrasive composites in a cross-linked polymeric binder, topped with a solid overlayer of eroding particles and a water-soluble polymer, which enhances initial cut and allows for effective surface finishing of powder clear coats without pre-conditioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If abrasive particles are embedded in the binder within the abrasive composite body, then the abrasive article maintains structural integrity and durability, but the abrasive particles are not available for abrading and initial cut performance is poor
Solution Approach 1:
The patent applies preliminary action by incorporating a pre-formed solid overlayer containing eroding particles on the abrasive surface before use. This overlayer is designed to erode during initial contact with the workpiece, automatically exposing the embedded abrasive particles without requiring manual conditioning. The eroding particles have sufficient hardness to remove binder material and reveal abrasive particles, thereby preparing the surface for effective cutting action.
2Productivity
If a separate conditioning step using another coated abrasive article is used to expose abrasive particles, then initial cut performance is improved, but the process complexity and time required increase
Solution Approach 1:
The patent merges the conditioning function and the abrasive cutting function into a single integrated article. The solid overlayer containing eroding particles is incorporated directly onto the abrasive composites, combining the surface preparation function with the cutting function. This eliminates the need for a separate conditioning step using another coated abrasive article, reducing process complexity and time while maintaining improved initial cut performance.
3Productivity
If the abrasive surface is abraded prior to initial use to expose particles, then cut performance is improved, but the manufacturing steps and time required increase
Solution Approach 1:
The patent applies preliminary action by pre-forming the solid overlayer with eroding particles during the manufacturing process. This overlayer is designed to automatically erode during initial contact with the workpiece, exposing abrasive particles without requiring separate pre-use conditioning steps. The eroding particles are selected to have appropriate hardness to remove binder material and reveal abrasive particles, thereby eliminating preparation time before use.
4Stability of the object's composition
If abrasive particles are deeply embedded in the binder, then the abrasive composites maintain structural stability, but the abrasive particles become unavailable for effective surface finishing of powder clear coats
Solution Approach 1:
The patent applies local quality by creating a differentiated structure where the solid overlayer with eroding particles is positioned specifically on the abrasive surface. This localized structure allows the eroding particles to selectively expose abrasive particles in the contact zone, providing the necessary adaptability for surface finishing of powder clear coats while maintaining the structural stability of the embedded abrasive composites in the body.
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 provides improved initial cut performance and enables successful surface finishing of powder clear coats, eliminating the need for a separate conditioning step and enhancing the abrasive article's effectiveness on workpieces with various coatings.
Implementation Method 1
a water-soluble polymer, wherein the eroding particles have a D50 that is less than or equal to the D50 of the abrasive particles
Implementation Method 2
The cut performance of current products is very sensitive to the type of workpiece coating materials... structured abrasive article... eroding particles with a Mohs scale hardness of at least 4
Implementation Method 3
the precisely-shaped abrasive composites comprise abrasive particles in a cross-linked polymeric binder
Implementation Method 4
frictionally contacting at least a portion of the topographically structured abrasive layer of the structured abrasive article with a workpiece
Data Source
AI summary
A structured abrasive article comprises a backing with a topographically structured abrasive layer secured thereto. The topographically structured abrasive layer comprises precisely-shaped abrasive composites. A solid overlayer comprising eroding particles with a Mohs scale hardness of at least 4 and a water-soluble polymer is disposed on at least a portion of the topographically structured abrasive layer. Methods of making and using the structured abrasive articles are also disclosed.