Fatty Acid Odor Control in Absorbent Diaper Pads
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Solution Overview
Problem
Disposable diapers lack effective odor control during and after use, as existing absorbent materials do not adequately manage moisture and odor absorption simultaneously.
Innovation Solution
Incorporating a particulate odor control material comprising one or more fatty acids, such as stearic and oleic acids, into the absorbent core of the diaper, intermixed with cellulose fibers and superabsorbent particles to form a solid composition that maintains effectiveness at elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If existing absorbent materials are used in disposable diapers, then moisture absorption is achieved, but odor control is insufficient
Solution Approach 1:
The patent combines fatty acid particles (odor control agent) with superabsorbent particles and cellulose fibers to create a composite absorbent core material. This composite structure allows simultaneous moisture absorption by the SAP/cellulose and odor control by the fatty acid particles, resolving the contradiction between moisture absorption capability and odor control effectiveness.
Solution Approach 2:
Fatty acid particles act as an intermediary substance that interacts with odor-causing compounds in the moisture. The fatty acids neutralize odors through chemical interaction while the superabsorbent material manages the moisture, allowing both functions to work together without interfering with each other.
2Object-affected harmful factors
If odor control material is added to the absorbent core, then odor control improves, but material complexity increases
Solution Approach 1:
The patent merges the odor control function with the existing absorbent core structure by incorporating fatty acid particles directly into the matrix of superabsorbent particles and cellulose fibers. This integration eliminates the need for separate odor control layers or components, reducing overall device complexity while maintaining effective odor control.
3Object-affected harmful factors
If higher concentrations of odor control material are used, then odor control efficacy increases, but manufacturing complexity increases
Solution Approach 1:
The patent controls the concentration of fatty acid particles as a variable parameter in the absorbent core composition. By optimizing the concentration range and using standard mixing processes, the patent achieves effective odor control without requiring complex manufacturing procedures, resolving the contradiction between efficacy and ease of manufacture.
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 absorbent pad effectively reduces odor over time, with higher concentrations of the odor control material showing greater efficacy in minimizing odor emission, as demonstrated by odor control tests.
Implementation Method 1
an odor control material intermixed within the batt of cellulose fibers, wherein the odor control material is a particulate material including one or more fatty acid
Data Source
AI summary
An absorbent pad includes a batt of cellulose fibers, superabsorbent particles intermixed within the batt of cellulose fibers, and an odor control material intermixed within the batt of cellulose fibers, wherein the odor control material is a particulate material including one or more fatty acid. The odor control material preferably further includes selected inorganic compounds, such as sources of nitrogen, phosphorus and iron. Various embodiments incorporate the absorbent pad in a diaper or other disposable hygiene product.