Absorbent Article Cuff Elastic Force Distribution
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Solution Overview
Problem
Conventional absorbent articles with leak-proof cuffs and leg cuffs face challenges in effectively preventing lateral leakage and achieving a well-fitting design, as the existing cuffs lack sufficient leakage prevention and proper fitting capabilities.
Innovation Solution
The absorbent article incorporates leak-proof cuffs with a specific configuration, including a base end portion and a stand-up portion that is folded along a longitudinal direction, featuring a first and second stand-up portion with leak-proof-cuff-forming elastic members arranged in a stretchable state, and leg cuffs with leg-cuff-forming elastic members, where the contractive force per leak-proof-cuff-forming elastic member is smaller than per leg-cuff-forming elastic member at a certain cuff length, but the whole second stand-up portion has a larger contractive force than the whole leg cuff at that length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contractive force per elastic member in the leak-proof cuff is increased to improve leakage prevention, then the leakage prevention capability is improved, but the risk of compression marks on the wearer's skin increases
Solution Approach 1:
The patent applies different contractive force characteristics to different regions: the leak-proof cuff (second stand-up portion) has higher total contractive force for leakage prevention, while the leg cuff has lower contractive force per member to reduce compression marks. This local differentiation of elastic properties resolves the contradiction between effective leakage prevention and comfort.
2Adaptability or versatility
If the contractive force per elastic member in the leg cuff is increased to improve fitting, then the fitting capability is improved, but the leakage prevention capability of the leak-proof cuff deteriorates
Solution Approach 1:
The patent differentiates the elastic member properties between the leg cuff and leak-proof cuff regions. The leg cuff uses elastic members with higher individual contractive force for better fitting, while the leak-proof cuff uses multiple members with lower individual force but higher total force for effective leakage prevention, resolving the contradiction between fitting and leakage prevention.
3Reliability
If the number of elastic members in the leak-proof cuff is increased to improve leakage prevention, then the leakage prevention capability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the elastic members into two distinct groups with different characteristics: multiple members in the leak-proof cuff for leakage prevention and fewer members in the leg cuff for fitting. This segmentation allows each group to be optimized independently, improving leakage prevention without unnecessarily increasing overall complexity.
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 absorbent article's ability to prevent lateral leakage while ensuring a well-fitting design that effectively contacts the skin, reducing the risk of compression marks and improving the standing-up behavior of the cuffs.
Implementation Method 1
a plurality of leak-proof-cuff-forming elastic members are arranged in the lateral direction in a stretchable state in the longitudinal direction... a plurality of leg-cuff-forming elastic members are arranged in the lateral direction in a stretchable state in the longitudinal direction
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A plurality of elastic members (36) are provided in a stretchable state in the longitudinal direction (X) in a second stand-up portion (35) of a leak-proof cuff (3), and a plurality of elastic members (42) are provided in a stretchable state in the longitudinal direction (X) in a leg cuff (41). The contractive force per one elastic member (36) in the second stand-up portion (35) at a cuff longitudinal length of 70 is smaller than the contractive force per one elastic member (42) in the leg cuff (41) at a cuff longitudinal length of 70, and the contractive force of the whole second stand-up portion (35) at a cuff longitudinal length of 70 is larger than the contractive force of the whole leg cuff (41) at a cuff longitudinal length of 70, where the cuff longitudinal length is the longitudinal length of each of the leak-proof cuff (3) and the leg cuff (41), and the cuff longitudinal length of the cuff (3) and that of the cuff (41) in a fully stretched state are each defined as 100.