Porous Abrasive Article: Independent Voids for Cut, Life, and Dust Extraction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional abrasive discs with dust-extraction holes or net-type knit backing suffer from low abrasive performance (cut and/or life) despite providing superior dust extraction and anti-loading properties, necessitating a product that enhances both performance and dust extraction.

Innovation Solution

An abrasive article with a pattern-coated abrasive layer on a porous backing, featuring well-defined abrasive areas and open spaces, allowing independent optimization of abrasive performance and dust extraction through a hook-and-loop attachment mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If abrasive is coated onto fibers of net-type knit backing, then dust extraction and anti-loading properties are improved, but abrasive performance (cut and life) deteriorates

Engineering Contradiction:

Improvedust extractionVSAvoidabrasive performance

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The abrasive article is divided into distinct functional zones: a net-type knit backing providing dust extraction and anti-loading properties, and a separate abrasive coating layer providing cut and life performance. This segmentation allows each component to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the abrasive article have different properties: the backing layer has high porosity for dust extraction, while the abrasive coating layer has optimized abrasive particles for cut performance. This local differentiation resolves the contradiction by assigning specific functions to specific regions.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If dust-extraction holes are converted into abrasive discs, then dust extraction is improved, but abrasive performance (cut and life) deteriorates

Engineering Contradiction:

Improvedust extractionVSAvoidabrasive performance

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The abrasive article separates the dust extraction function (handled by the net-type backing with its porous structure) from the abrasive function (handled by the coated abrasive layer). This eliminates the need to compromise abrasive performance for dust extraction, as both functions are independently optimized in separate components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The net-type knit backing acts as an intermediary structure that facilitates dust extraction without directly providing the abrasive action. It mediates between the dust extraction requirement and the abrasive performance requirement by providing a supportive framework for the abrasive coating.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If net type product is used, then dust extraction and anti-loading properties are improved, but cut and life performance are reduced

Engineering Contradiction:

Improvedust extractionVSAvoidcut and life performance

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of stationary object

Solution Approach 1:

The abrasive article uses a composite structure combining the net-type knit backing material with an abrasive coating material. This composite approach allows the article to simultaneously exhibit the dust extraction properties of the net-type backing and the cut performance properties of the abrasive coating, resolving the contradiction between dust extraction and service life.

Inventive Principle:

Principle #40Composite materials

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 abrasive article achieves enhanced cut and life performance while maintaining superior dust extraction capabilities, with air flow rates of at least 1.0 L/s, effectively removing dust from abraded surfaces.

Implementation Method 1

air flow rates of at least 1.0 L/s, effectively removing dust from abraded surfaces

Methodology Applied

Scientific EffectAir flow:

Implementation Method 2

a two-part interconnecting attachment mechanism. The two-part interconnecting attachment mechanism may be a hook-and-loop two-part interconnecting attachment mechanism

Methodology Applied

Scientific EffectHook-and-loop attachment: Velcro

Data Source

PatentUS12370647B2Porous abrasive article

Publication Date: 2025.07.29 3M INNOVATIVE PROPERTIES CO

AI summary

An abrasive article comprising an attachment layer and an abrasive layer. The attachment layer comprises a porous backing having a first major surface, an opposed second major surface, and a first plurality of voids extending from the first major surface to the second major surface. The abrasive layer has a third major surface and an opposed fourth major surface and comprises a cured composition, abrasive particles at least partially embedded in the cured composition, and a second plurality of voids extending from the third major surface to the fourth major surface. The first major surface of the attachment layer is adjacent the third major surface of the abrasive layer, and the pattern of the second plurality of voids is independent of the pattern of the first plurality of voids.