Flexible Abrasive Article with Embedded Ink Layer
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Solution Overview
Problem
Conventional flexible abrasive articles face challenges in printing images on their backing surfaces due to interference with abrasive coating adhesion and practical limitations, such as damage to high-volume printing equipment and increased manufacturing complexity and costs.
Innovation Solution
The solution involves placing the image within the interior of the backing, using a first non-tacky base layer, an ink layer confined between two thermoplastic base layers, and an abrasive layer, allowing for efficient and high-integrity image impartation with vibrant colors and legible technical information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If images are printed directly on the backing surface facing the abrasive layer, then the image is visible from the abrasive side, but the ink interferes with the adhesion of the abrasive coating
Solution Approach 1:
The patent transitions from printing on the surface (2D) to embedding within the bulk (3D) of the backing layer. Images are formed by incorporating pigments or dyes into the polymer matrix during extrusion, creating internal coloration that eliminates surface ink layers and their interfering effects on abrasive adhesion.
Solution Approach 2:
The patent introduces an intermediary approach where the image-forming agents (pigments/dyes) are integrated within the polymer matrix rather than applied as a surface layer. This intermediary integration allows the image to be conveyed without creating a separate ink layer that would interfere with abrasive coating adhesion.
2Reliability
If images are printed on the opposite side of the backing, then adhesion is not interfered with, but the back surface is blocked by the support film
Solution Approach 1:
The patent eliminates the need to print on the opposite side by embedding images within the backing layer itself. This internal embedding approach provides manufacturing accessibility from either side while maintaining adhesion integrity, as no surface printing is required on the support film side.
3Ease of manufacture
If the support film is stripped off before printing, then the back surface is accessible, but high-volume printing equipment suffers damage from friction
Solution Approach 1:
The patent extracts the image-forming function from the surface printing process and embeds it within the backing layer during extrusion. This eliminates the need for separate printing operations after support film removal, thereby preventing equipment damage from friction while maintaining manufacturing efficiency.
Solution Approach 2:
The patent performs the image formation action during the extrusion process itself, before the backing layer is applied to the abrasive. This preliminary embedding of pigments or dyes into the polymer matrix eliminates subsequent printing steps that would require support film removal and cause equipment damage.
4Object-affected harmful factors
If masking material is placed to protect rollers, then equipment damage is prevented, but manufacturing complexity and costs increase
Solution Approach 1:
The patent extracts the image formation step from the post-extrusion processing sequence and integrates it into the extrusion process itself. This eliminates the need for masking operations entirely, as no surface printing is performed after the backing layer is formed, thereby reducing manufacturing complexity and eliminating masking material costs.
Data Source
AI summary
A flexible abrasive article is provided with a first, non-tacky base layer having opposed first and second major surfaces. An ink layer is disposed on the first major surface of the first base layer, while a second, thermoplastic base layer is disposed on the ink layer whereby the ink layer is located between the first and second base layers. Disposed on the second base layer is an abrasive layer such that the second base layer is located between the abrasive layer and the ink layer. Compared with conventional printed flexible adhesive articles, the provided articles improved robustness while avoiding manufacturing difficulties related to flexographic printing onto abrasive coated articles.