Multi-Layer Nonwoven Cleaning Substrate with Controlled Rough Surface
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Solution Overview
Problem
There is a need for durable nonwoven materials with a rough outer surface suitable for cleaning and scrubbing applications that do not disintegrate easily and can effectively remove dirt and stains, while also being cost-effective and flexible.
Innovation Solution
A multi-layer nonwoven material is developed with a controlled rough outer surface, comprising layers of synthetic and cellulose fibers, where the roughness is modulated by stabilizing temperature, and includes bicomponent fibers and binders to enhance durability and cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a nonwoven material is made thinner to reduce material usage and manufacturing cost, then productivity and cost-effectiveness improve, but the material may become less durable and more prone to disintegration
Solution Approach 1:
The patent employs a multi-layer composite structure combining different fiber types (cellulose and synthetic fibers) with distinct functionalities. The cellulose layers provide absorbency and softness while synthetic layers provide strength and structural integrity. This composite approach allows thinning of individual layers while maintaining overall durability through synergistic layer interactions.
Solution Approach 2:
The nonwoven material is divided into multiple functional layers including outer layers with rough surfaces for scrubbing, intermediate layers for binding, and inner layers for absorbency. This segmentation allows each layer to be optimized for its specific function while collectively providing durability even when the overall structure is thin.
2Ease of operation
If the outer surface is made rougher to enhance scrubbing capability and dirt removal, then cleaning efficiency improves, but the material may become less flexible and more prone to disintegration
Solution Approach 1:
The patent applies local quality by creating rough textured surfaces only on the outer layers where scrubbing action is needed, while keeping inner layers smooth and flexible. The roughness is localized to specific surface regions rather than throughout the entire material structure, maintaining flexibility internally while providing enhanced cleaning externally.
Solution Approach 2:
The rough outer surface is achieved through three-dimensional fiber arrangement and surface topology modification rather than increasing material thickness. The roughness exists as surface topography in the vertical dimension while the bulk material remains thin and flexible, separating surface properties from bulk properties.
3Reliability
If multiple layers are added to improve durability and cleaning performance, then reliability and cleaning efficiency improve, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple functions into a integrated multi-layer structure where outer layers provide both structural strength and rough surface scrubbing capability, intermediate layers provide binding and transition, and inner layers provide absorbency. This merging of functions into a cohesive layered system achieves high reliability without proportionally increasing complexity, as each layer serves multiple purposes.
Solution Approach 2:
Each layer in the multi-layer structure is designed with multi-functionality. For example, outer layers simultaneously provide structural integrity, rough surface for scrubbing, and partial absorbency. This multi-functionality reduces the need for additional specialized layers, controlling overall complexity while maintaining high durability and performance.
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 material achieves improved cleaning efficiency and durability, with increased static and kinetic coefficients of friction, outperforming commercially available products in scrubbing and dirt removal capabilities, and is suitable for various surfaces without disintegrating.
Implementation Method 1
The first outer layer can have a static coefficient of friction ranging from about 0.01 to about 3.0 and a kinetic coefficient of friction ranging from about 0.0001 to about 2.0
Implementation Method 2
The rigidity of the rough outer surface is controlled by the temperature at which the nonwoven material is stabilized or by otherwise heating the outer layer of the nonwoven material
Data Source
AI summary
The presently disclosed subject matter relates to nonwoven materials and their use in cleaning articles. More particularly, the nonwovens are layered structures including a rough outer surface which are useful for scrubbing and cleaning purposes.