Fluid-Activated Barrier Structures for Absorbent Articles
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Solution Overview
Problem
Absorbent articles, such as feminine care and incontinence products, often experience leakage due to inadequate body fit, especially during fluid insults or when full, leading to discomfort and social embarrassment, particularly for women, who may avoid public places to avoid such incidents.
Innovation Solution
The development of an absorbent article with liquid shrinkable strings integrated into flat barrier structures that stay flat before use but shrink upon fluid contact, activating to form a closer body fit and barrier against leakage, reducing the likelihood of fluid escaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If barrier structures are added to improve body fit and leak protection, then leakage protection is improved, but the product bulk increases
Solution Approach 1:
The barrier structures are designed to dynamically change from a flat state during storage to an activated three-dimensional state upon fluid contact. The liquid shrinkable strings shrink when exposed to fluid, automatically pulling the barrier structures into a raised configuration that provides leak protection without adding permanent bulk to the product.
Solution Approach 2:
The barrier structures undergo parameter changes in response to fluid exposure. The liquid shrinkable strings change their physical parameters (length, tension) when contacted by fluid, which triggers the barrier structures to transition from a flat to an activated state, providing leak protection only when needed.
2Reliability
If barrier structures are made three-dimensional to capture excess fluid, then leakage protection is improved, but the structures are easily flattened during use making the article uncomfortable
Solution Approach 1:
The barrier structures dynamically transition between flat and three-dimensional states. During storage and wear, they remain flat for comfort. Upon fluid contact, they automatically activate to a three-dimensional configuration for leak protection, eliminating the compromise between comfort and protection.
Solution Approach 2:
The barrier structures are prepared in a flat, comfortable state before use. The liquid shrinkable strings are pre-positioned to automatically activate the barrier structures into a protective configuration when fluid is detected, without requiring user intervention or compromising initial comfort.
3Ease of operation
If absorbent article is kept flat for comfort, then comfort is improved, but body fit is reduced leading to leakage
Solution Approach 1:
The absorbent article maintains a flat profile during storage and initial wear for comfort. When fluid contacts the liquid shrinkable strings, they shrink and pull the barrier structures into a raised configuration that conforms to the body, dynamically achieving close body fit only when needed for leak protection.
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 article maintains fluid within the pad, minimizing leakage and enhancing user confidence and comfort, even on heavy-flow days, without adding bulk, thus addressing the issue of leakage and discomfort.
Implementation Method 1
liquid shrinkable strings in the flat barrier structures shrink and pull the structures inward, causing them to lift and activate to the desired shape
Data Source
AI summary
An absorbent article has a longitudinal direction, a transverse direction, a first major surface which forms a body-facing surface of the absorbent article, and a second major surface disposed distally from the first major surface which forms a garment-facing surface of the absorbent article. The article includes an absorbent core positioned between the first major surface and the second major surface. The article also includes at least one barrier structure having an inward-facing side and an outward-facing side, and at least one liquid shrinkable string. The at least one barrier structure is disposed on the first major surface, and the inward-facing side of the at least one barrier structure is attached to the absorbent article. In addition, a first portion of the at least one liquid shrinkable string is attached to the at least one barrier structure.