Absorbent Core Curved Channels Prevent Folding
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Solution Overview
Problem
Absorbent cores with longitudinally extending channels in absorbent pants tend to fold unnaturally when applied, leading to reduced surface contact with the body, increased risk of leakage, and poor fit, especially in the crotch region.
Innovation Solution
The absorbent core features a unique channel configuration with curved, longitudinally-oriented channels that are closer to the central axis at their necking point, spaced apart to prevent folding into a narrow U-shape, ensuring optimal fit and coverage by maintaining wider contact with the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If longitudinally extending channels are provided in the absorbent core, then liquid acquisition rate is improved and saggy appearance is reduced, but the absorbent core folds unnaturally when applied to the body
Solution Approach 1:
The patent applies curvature to the channel configuration by defining curved channels that follow a natural arc rather than straight longitudinal lines. The channels are configured to curve gently from the front waist region through the crotch region to the rear waist region, allowing the absorbent core to conform to the body's contours without unnatural folding while maintaining liquid distribution capabilities
Solution Approach 2:
The patent segments the channel system into multiple curved sections rather than using a single continuous straight channel. The channels are divided into front, crotch, and rear portions with different curvature characteristics, allowing each segment to adapt to specific body regions while collectively preventing unnatural folding of the entire absorbent core
2Strength
If longitudinally extending channels are provided in the absorbent core, then structural rigidity is improved, but surface contact with the body is reduced
Solution Approach 1:
The curved channel configuration allows the absorbent core to bend and conform to the body's surface contours rather than maintaining rigid straight lines. This curvature enables the core to wrap around the body's anatomy, increasing surface contact area while the channels still provide sufficient structural rigidity to prevent sagging and maintain shape
3Quantity of substance
If channels are spaced closely together, then liquid distribution is improved, but the absorbent core folds into a narrow U-shape
Solution Approach 1:
The patent applies different channel spacing characteristics to different regions of the absorbent core. The channels are spaced closer together in regions requiring enhanced liquid distribution while being spaced farther apart in regions where fold prevention is critical. This local variation in spacing allows the core to fold properly without forming narrow U-shapes while still providing adequate liquid distribution
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 configuration enhances the fit and reduces leakage risks by maintaining wider contact with the body, particularly in the crotch region, and improves comfort and surface coverage.
Implementation Method 1
Absorbent cores including longitudinally-oriented channels have been developed. Appropriately located and structured longitudinal channels can help distribute liquid along deposits of absorbent polymer particles along the length of the absorbent core
Data Source
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Figure 2B
AI summary
A disposable absorbent pant (10) comprising a central chassis (30) and elasticized front and rear belts (22,23). The central chassis (30) comprises an absorbent core (115) with an absorbent layer (117). The absorbent layer (117) comprises a first and a second longitudinally-oriented elongate channel (126,226) formed therein.