Flexible Abrasive Article with Removable Support Image Layer
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Solution Overview
Problem
The stiffness of typical paper-backed sandpaper makes it difficult to wrap around fingertips for precise control in tight spaces, leading to reduced product life due to cracking.
Innovation Solution
A flexible abrasive article with a removable support sheet that allows for printing of an image layer, which is then transferred to a polyurethane backing layer, enabling the use of a flexible and durable backing without interfering with the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible polyurethane backing layer is used instead of paper-backed substrate, then flexibility and durability are improved, but the ability to print image layer directly on the backing is lost due to interference from additional support layer
Solution Approach 1:
The patent divides the manufacturing process into distinct segments: first applying the image layer to a removable support sheet, then separately applying the flexible backing layer, and finally removing the support sheet. This segmentation allows each layer to be optimized independently - the support sheet provides a printable surface while the backing layer provides flexibility, resolving the contradiction between printability and flexibility.
Solution Approach 2:
The removable support sheet acts as an intermediary carrier that temporarily holds the image layer during manufacturing. It provides a stable, printable surface that is later removed, allowing the flexible backing layer to be applied without interfering with the image layer formation. This intermediary enables both printing capability and final flexibility.
2Stability of the object's composition
If an additional support layer is added during manufacturing to provide integrity, then structural stability is improved, but the back surface printing capability is lost
Solution Approach 1:
The image layer is applied in advance to the removable support sheet before the flexible backing layer is applied. This preliminary action allows the image layer to be formed with proper structural support during printing, and the support sheet is later removed without affecting the already-formed image layer on the flexible backing.
3Ease of manufacture
If paper-backed sandpaper is used, then printing of product information is easy, but flexibility and conformability are reduced leading to cracking
Solution Approach 1:
The removable support sheet is a temporary, disposable element used only during manufacturing. It provides the necessary printable surface and structural support during production, then is discarded after serving its purpose. This allows easy printing during manufacturing while the final product uses a flexible backing that prevents cracking during use.
Data Source
AI summary
An abrasive article having a removable support sheet having a first major surface. An image layer containing inks applied over the first major surface. A polyurethane backing layer having a first major backing surface located adjacent to the image layer and a second major backing surface opposite the first major surface. A functional layer comprising an abrasive layer applied to the second major surface; the abrasive layer comprising a make coat, abrasive particles and a size coat.