Embossed Fibrous Structure for Low Modulus and Elongation
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Solution Overview
Problem
There is a lack of fibrous structures in the market that exhibit a Geometric Mean Modulus (GM Modulus) of less than 1070 g/cm and/or a Geometric Mean Elongation (GM Elongation) of less than 15%, which are desirable properties for consumers but not currently met by existing single-ply, embossed fibrous structures.
Innovation Solution
The development of fibrous structures with a GM Modulus of less than 1070 g/cm and/or a GM Elongation of less than 15%, specifically including single-ply, embossed structures that achieve these properties through the use of specific manufacturing processes and materials such as co-formed structures with polypropylene filaments and wood pulp fibers, and the incorporation of linear elements oriented in specific directions to enhance mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fibrous structures are used, then manufacturing simplicity is maintained, but GM Modulus exceeds 1070 g/cm and GM Elongation exceeds 15%
Solution Approach 1:
The fibrous structure is segmented into multiple layers with different orientations and properties. The structure includes a first ply and a second ply, each with specific fiber orientations and characteristics, allowing independent optimization of mechanical properties to achieve GM Modulus < 1070 g/cm while managing structural complexity
Solution Approach 2:
The invention uses composite fibrous materials combining different fiber types (cellulosic fibers, synthetic fibers) with distinct mechanical properties. Each layer uses composite materials with specific GM Modulus and GM Elongation characteristics, enabling the overall structure to meet target properties through material selection rather than increasing structural complexity
2Stability of the object's composition
If conventional fibrous structures are used, then manufacturing simplicity is maintained, but GM Elongation exceeds 15%
Solution Approach 1:
The fibrous structure is segmented into multiple layers with different orientations and properties. The structure includes a first ply and a second ply, each with specific fiber orientations and characteristics, allowing independent optimization of mechanical properties to achieve GM Elongation < 15% while managing structural complexity
Solution Approach 2:
Different regions of the fibrous structure have different local properties optimized for specific functions. The first ply and second ply have different fiber compositions, orientations, and mechanical properties tailored to achieve overall GM Elongation < 15% through localized property optimization rather than uniform complex structure
Data Source
AI summary
Fibrous structures that exhibit a Geometric Mean Modulus (GM Modulus) of less than 1402.4 g/cm at 15 g/cm as measured according to the Modulus Test Method described herein and a Geometric Mean Elongation (GM Elongation or GM Elong) of less than 10.2% measured according to the Elongation Test Method described herein are provided.