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 properties, while being able to retain these features when packaged in a compressed form, and for absorbent articles that minimize in-bag stack height to enhance handling and reduce distribution costs.
Innovation Solution
A nonwoven fabric with a visually discernible pattern of three-dimensional features, formed on a shaped forming belt, utilizing continuous spunbond filaments in a single process, which retains its caliper and aesthetic properties even after compression, achieved through melt spinning and controlled fiber distribution on a patterned forming belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If nonwoven fabrics are compressed for packaging, then in-bag stack height is reduced and distribution costs decrease, but three-dimensional surface features are lost and aesthetic properties deteriorate
Solution Approach 1:
The nonwoven fabric is pre-formed with three-dimensional surface features integrated into the fabric structure before packaging. The shaped features are created during the fabric formation process itself, so they are already in place and can withstand subsequent compression during packaging and distribution without being lost.
Solution Approach 2:
Instead of applying compression to a flat fabric and then trying to restore features, the invention inverts the approach by first creating the three-dimensional features in the fabric structure, then applying compression. The features are designed to be compression-resistant from the outset, maintaining their shape even when compressed for packaging.
2Ease of operation
If nonwoven fabrics are made softer, then user comfort and aesthetic properties improve, but physical integrity and fuzzing resistance worsen
Solution Approach 1:
The fabric incorporates three-dimensional surface features that create local variations in structure and properties. These shaped features provide softness and aesthetic appeal in contact areas while maintaining overall fabric integrity through the distributed pattern of features throughout the material structure.
Solution Approach 2:
The nonwoven fabric combines different fiber types and structural elements to achieve both softness and strength. The composite structure includes varied fiber compositions that provide gentle contact surfaces while maintaining tensile strength and resistance to fuzzing through the integrated three-dimensional feature pattern.
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 fabric maintains significant caliper and aesthetic benefits post-compression, reducing in-bag stack height and enhancing user experience, while maintaining absorbency and softness, thus facilitating easier handling and lower distribution costs.
Implementation Method 1
utilizing continuous spunbond filaments in a single process, which retains its caliper and aesthetic properties even after compression, achieved through melt spinning
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, wherein the intensive property is one or more of thickness, basis weight, or volumetric density, and wherein the first surface has a TS7 value different than a TS7 value of the second surface.