Tampon Composite Fibrous Web Structural Integrity
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Solution Overview
Problem
Tampon manufacturing processes face challenges in balancing cost and performance, including securing the absorbent core covering to prevent separation during use, which can lead to exposure and contamination.
Innovation Solution
A tampon design featuring a composite fibrous web made of entangled staple cellulosic fibers and meltspun filaments, where the meltspun web defines a substantial portion of the outer surface, providing a monolithic and secure absorbent component within a tubular carrier, reducing the risk of separation and enhancing absorbency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a covering is used to surround the absorbent core, then the structural integrity and protection of the absorbent core is improved, but the risk of separation between the covering and absorbent core during handling increases
Solution Approach 1:
The patent merges the covering and absorbent core into a single composite fibrous assembly where the covering is formed from the same continuous fibrous material as the absorbent core. This integration eliminates the interface between separate components, preventing separation during handling while maintaining structural integrity.
Solution Approach 2:
The patent uses a composite fibrous assembly consisting of entangled cellulosic fibers and meltspun filaments. The meltspun filaments are embedded within the cellulosic fiber matrix, creating a composite structure where the covering and absorbent core are inherently bonded through material intermingling rather than mechanical attachment.
2Adaptability or versatility
If traditional separate components (absorbent core and covering) are used, then manufacturing flexibility is improved, but process complexity and cost increase
Solution Approach 1:
The patent combines multiple manufacturing operations into a single continuous process. The fibrous assembly is formed, entangled, and shaped in one continuous operation, eliminating the need for separate assembly steps to attach the covering to the absorbent core. This reduces process complexity while maintaining manufacturing flexibility through continuous production.
Solution Approach 2:
The patent implements a continuous manufacturing process where the fibrous assembly is formed, entangled, and shaped without interruption. The continuous nature of the process eliminates intermediate handling and assembly steps, reducing complexity while allowing for flexible production through continuous adjustment of process parameters.
3Reliability
If more raw materials are used per tampon, then performance requirements (sterility, safety, absorbency) are improved, but per unit cost increases
Solution Approach 1:
The patent uses a composite fibrous assembly where meltspun filaments are embedded within cellulosic fibers. This composite structure provides both the absorbency of cellulosic materials and the structural integrity and surface definition of thermoplastic filaments, achieving performance requirements while optimizing material usage through the synergistic properties of the composite.
Solution Approach 2:
The patent changes the physical state and arrangement of materials through entanglement and compression. The fibrous assembly is entangled to create a three-dimensional structure that maximizes absorbency, then compressed to achieve the desired shape and density. This optimization of material arrangement rather than simply increasing material quantity achieves performance goals while controlling costs.
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 solution enhances the structural integrity and absorbency of the tampon while reducing material costs and process complexity, minimizing the risk of contamination and improving user safety by ensuring the absorbent core remains intact during use.
Implementation Method 1
a composite fibrous web of staple cellulosic fibers and a meltspun web of filaments entangled with the web of staple cellulosic fibers
Implementation Method 2
The absorbent core expands upon exposure to bodily fluids and also absorbs the fluids
Implementation Method 3
The absorbent core expands upon exposure to bodily fluids and also absorbs the fluids
Implementation Method 4
at least portion of the outer surface of the absorbent component is defined by the meltspun web of filaments
Data Source
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Figure 7
AI summary
The present disclosure describes a tampon article, a composite fibrous web, and a method of making same. Such an article includes an outer carrier component including an inner surface that defines an internal void. Including an absorbent component elongate along an axis and is disposed in the internal void. The absorbent component includes an outer surface that extends about the axis and faces the inner surface. The absorbent component further includes a composite fibrous web of staple cellulosic fibers and a meltspun web of filaments entangled with the web of staple cellulosic fibers. The composite fibrous web can be in a compressed configuration in the internal void such that at least portion of the outer surface of the absorbent component is defined by the meltspun web of filaments. The tampon can include a withdrawal cord coupled to the absorbent component.