Coated Abrasive Line of Weakness for Clean Size Separation
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Solution Overview
Problem
Manufacturing coated abrasive articles in various shapes and sizes is challenging due to high production costs and limited availability, with existing perforated products prone to dust-loading and rough edges that reduce their useful life.
Innovation Solution
Coated abrasive articles with a line of weakness in the backing material that does not penetrate the abrasive coating, allowing for easy separation into smaller products using laser technology, enabling efficient production and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If perforations are provided through the entire thickness of the abrasive article to enable separation into smaller portions, then ease of separation is improved, but dust-loading points are created that limit useful life and rough edges damage the abrasive coating
Solution Approach 1:
The invention divides the backing material into multiple sections using perforations that extend only partway through the thickness, creating a line of weakness that allows clean separation while maintaining the integrity of the abrasive coating. The perforations are positioned and configured to enable easy tearing along predetermined lines without compromising the functional layers.
Solution Approach 2:
The perforations are designed with specific local characteristics - they extend only through the backing material and not through the abrasive coating layers. This localized penetration creates separation capability in the backing while preserving the continuous, intact abrasive surface needed for effective abrasion and dust collection.
2Ease of manufacture
If larger abrasive products are produced to meet variety of demands, then manufacturing cost is reduced and packaging requirements are minimized, but adaptability to different application shapes and sizes is limited
Solution Approach 1:
The invention produces large abrasive articles with integrated perforation patterns that allow end-users to divide the single large product into multiple smaller articles of various sizes and shapes. This segmentation capability enables one manufacturing process to produce multiple product configurations, achieving both cost efficiency and versatility.
Solution Approach 2:
The invention transforms a static, fixed-size abrasive product into a dynamic system where the final configuration can be adjusted by the user based on application needs. The perforations provide predetermined lines of separation that enable flexible customization of the abrasive article size and shape after manufacturing.
3Ease of operation
If perforations penetrate the outer face of the abrasive coating to allow separation, then ease of separation is improved, but dust-loading points are created and rough edges damage the coating
Solution Approach 1:
The invention extracts the separation function from the abrasive coating layers and relocates it exclusively to the backing material. By confining perforations to the backing layer only, the design separates the tearing function from the abrasion function, allowing easy separation without creating harmful defects in the abrasive surface.
Solution Approach 2:
The invention converts what would traditionally be a harmful defect (perforations through the coating) into a beneficial feature by limiting perforations to the backing material. The line of weakness in the backing provides separation capability while the intact coating maintains abrasive performance and prevents dust-loading.
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
This solution allows for cost-effective production of larger abrasive products that can be easily converted into smaller ones, reducing packaging and stock requirements, while avoiding dust-loading and edge damage, thus extending product life and meeting customer demands.
Implementation Method 1
The line of weakness in the abrasive article may comprise perforations in the backing that do not penetrate the front face of the abrasive coating although they may, in some cases, extend into the abrasive coating. The/each said line of weakness is formed using a laser beam directed towards the backing from the side opposite the abrasive coating.
Data Source
Figure 1~3
Figure 4~5B
AI summary
A coated abrasive article (1) comprises a backing (3) having an abrasive coating (5) on one side, an attachment layer (7) on the other side of the backing, and a line of weakness (9) that does not penetrate the front face of the abrasive coating (5). The line of weakness, which may be formed using a laser beam, comprises a through-cut (11) in the attachment layer (7) and perforations (13) in the backing (3), and permits one part of the abrasive article (1) to be separated from another part. Alternatively, the abrasive article can be used in its original form.