Cleaning article with double bonded tow tufts
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Solution Overview
Problem
Existing cleaning articles with tow fibers are ineffective in capturing a wide range of debris due to improper spacing and density, leading to poor retention of granular and voluminous debris on hard surfaces.
Innovation Solution
A cleaning article with discretely spaced tufts of tow fibers joined to a carrier sheet by primary bonds, featuring secondary bonds that form channels for debris accumulation, reducing tuft thickness and optimizing debris interception and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tow fibers are spaced closely together, then small debris capture is improved, but large debris cannot enter and voluminous debris retention is poor
Solution Approach 1:
The cleaning surface is segmented into discrete tufts of tow fibers spaced apart from each other, creating individual cleaning zones that can handle different debris sizes independently
Solution Approach 2:
Different regions of the cleaning article have different tuft densities and configurations - areas with higher density for capturing small debris and areas with lower density for accommodating large debris
2Adaptability or versatility
If tow fibers are spaced far apart, then voluminous debris can enter, but small debris and granular debris are not captured
Solution Approach 1:
The cleaning surface is divided into multiple discrete tufts that can be strategically positioned to create a hierarchical filtering effect
Solution Approach 2:
The problem is solved by adding the dimension of vertical depth through tuft height variations, allowing small debris to be captured by closely spaced tufts while large debris enters through gaps between tufts
3Ease of manufacture
If uniform tuft spacing is used, then manufacturing is simple, but debris retention across different debris types is poor
Solution Approach 1:
The cleaning article features non-uniform tuft spacing where different regions have different spacing patterns optimized for specific debris types, with closely spaced tufts for fine debris and widely spaced tufts for large debris
Solution Approach 2:
The spacing parameter is varied across different regions of the cleaning article to optimize performance for different debris sizes and types
4Measurement precision
If tow fibers are densely packed, then small debris interception is improved, but tuft thickness increases reducing channel formation
Solution Approach 1:
The dense tuft structure is segmented into discrete units with controlled spacing, preventing excessive thickness accumulation while maintaining high interception capability
Solution Approach 2:
The tufts are designed with a thin film-like structure that provides sufficient surface area for debris interception while maintaining flexibility and preventing excessive thickness
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A cleaning article defining an XY plane and a Z direction perpendicular to the plane. The cleaning article has discrete tufts of tow fibers disposed on a carrier sheet. The discrete tufts have bond lines external to the tufts. The bond lines interrupt the Z-direction thickness of the tufts, to provide channels for improved collection and retention of debris from a target surface.