Shaped Nonwoven Fabric with Compression-Resistant 3D Features
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Solution Overview
Problem
There is a need for nonwoven fabrics with improved three-dimensional surface features that maintain physical integrity, softness, and reduced fuzzing, while being able to retain these features when packaged and used in absorbent articles, and for processes to manufacture such fabrics efficiently.
Innovation Solution
A nonwoven fabric with a visually discernible pattern of three-dimensional features and apertures, formed on a shaped forming belt, using continuous spunbond filaments in a single process, which retains its shape and properties during compression packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If nonwoven fabrics are compressed for packaging, then storage efficiency and distribution costs are improved, but the three-dimensional surface features and aesthetic properties are lost
Solution Approach 1:
The nonwoven fabric is pre-formed with three-dimensional surface features and microzones during the manufacturing process, before packaging. This preliminary structuring ensures that when the fabric is later compressed for packaging, the essential shape and functional features are already established and can better withstand compression without complete loss of form.
Solution Approach 2:
The fabric structure incorporates inherent compressive resistance through its three-dimensional construction and microzone architecture, providing a form of structural cushioning that protects the essential shape features during subsequent compression packaging, allowing the fabric to recover or maintain its form after compression.
2Ease of operation
If nonwoven fabrics are made softer, then comfort and aesthetic properties are improved, but physical integrity and strength are reduced
Solution Approach 1:
The fabric employs microzones with varying properties - some regions are designed to be softer and more compliant for comfort, while other regions maintain greater structural integrity. This local differentiation allows the fabric to exhibit softness where needed while preserving physical integrity in load-bearing areas.
Solution Approach 2:
The nonwoven fabric combines different fiber types, densities, and structural configurations within the same material system, creating a composite structure that integrates both softness for comfort and sufficient strength for physical integrity, resolving the contradiction between these opposing properties.
3Shape
If three-dimensional features are added to nonwoven fabrics, then aesthetic and functional properties are improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process merges the formation of three-dimensional surface features and microzones into a single integrated step during web formation, rather than requiring separate post-processing operations. This consolidation reduces manufacturing complexity while achieving the desired shape and functional properties.
Solution Approach 2:
The forming belt or manufacturing equipment is designed to simultaneously create multiple functions - three-dimensional surface features for aesthetics and fluid management, microzones for targeted absorption or distribution, and structural integrity - all in one process, reducing the need for multiple separate manufacturing steps.
4Productivity
If apertures are created in nonwoven fabrics, then absorbency and fluid distribution are improved, but structural strength is reduced
Solution Approach 1:
Apertures are strategically positioned within microzones rather than distributed uniformly throughout the fabric. This local concentration of apertures in specific regions maximizes absorbency and fluid distribution where needed while preserving structural integrity in other areas that require strength for support and handling.
Data Source
AI summary
A nonwoven fabric. The nonwoven fabric can include a first surface and a second surface and a visually discernible pattern of three-dimensional features on one of the first or second surface. Each of the three-dimensional features can define a microzone comprising a first region and a second region. The first and second regions can have a difference in values for an intensive property.