Fluid Etching Absorbent Core via Stencil Jets
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Solution Overview
Problem
Existing methods for creating absorbent cores in absorbent articles face challenges in precisely placing and maintaining absorbent material, as adhesives can inhibit fluid absorption and reduce core integrity, and traditional cutting methods damage the core structure.
Innovation Solution
A method of fluid etching using high-pressure jets and a stencil to selectively remove or modify absorbent material within the absorbent structure, creating voids and fissures without damaging the surrounding fibrous layers, allowing for precise modification of the absorbent core without compromising its integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesives are used to place and secure absorbent material, then the absorbent material can be fixed in location, but the adhesives inhibit fluid absorption and reduce core integrity
Solution Approach 1:
The patent removes adhesives entirely from the absorbent core structure. Instead of using adhesives to secure absorbent material, the invention uses a porous substrate that physically holds the absorbent particles through its porous structure, eliminating the harmful adhesive barrier that inhibits fluid absorption.
Solution Approach 2:
The patent employs a porous substrate as the foundation for the absorbent core. This porous structure provides both mechanical support and fluid permeability, allowing fluids to pass through while holding absorbent particles in place without requiring adhesives that would block fluid absorption.
2Ease of manufacture
If traditional knife cutting methods are used to extract foam portions, then large pieces of absorbent material can be removed, but the core structural integrity is reduced
Solution Approach 1:
The patent uses fluid jets (pneumatic or hydraulic method) to remove foam portions from the absorbent core. The high-velocity fluid selectively erodes and removes unwanted foam material without requiring physical cutting, thereby maintaining the structural integrity of the remaining core while enabling precise material extraction.
Solution Approach 2:
The patent replaces the mechanical knife cutting system with a fluid-based removal system. Instead of using blades that physically cut and damage the core structure, the invention uses fluid jets to selectively remove material through erosion and cavitation, preserving the integrity of surrounding structures.
3Quantity of substance
If absorbent material is placed throughout the entire core, then complete coverage is achieved, but precise location control and fluid flow management are reduced
Solution Approach 1:
The patent divides the absorbent core into distinct regions with different absorbent material distributions. By segmenting the core into zones with varying absorbent concentrations, the invention enables precise control over fluid flow paths and absorption locations, allowing different areas to perform specialized functions.
Solution Approach 2:
The patent creates non-uniform absorbent material distribution within the core, with different locations having different absorbent concentrations or types. This local quality variation allows optimization of fluid absorption and flow management in specific regions, enabling precise control over where and how fluids are absorbed.
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
This method enhances the absorbent structure's permeability and surface area while maintaining structural integrity, enabling precise control over absorbent material distribution and improved fluid handling properties.
Implementation Method 1
expelling fluid from the fluid jets through the open apertures of the stencil; and d) fissuring the absorbent stratum
Implementation Method 2
providing a fluid etching process comprising one or more fluid jets
Data Source
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AI summary
A method of fluid etching an absorbent stratum is disclosed. The method includes providing an absorbent stratum; providing a fluid etching process comprising one or more fluid jets, a carrier belt, and a stencil; c) expelling fluid from the fluid jets through the open apertures of the stencil; and d) fissuring the absorbent stratum.