Elastic Belt with Cut Windows for Diaper Fit
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Solution Overview
Problem
Pant-type wearable articles face challenges in providing balanced performance, including fit, comfort, prevention of sagging, and leakage, especially for young children, while maintaining cost-effectiveness and breathability.
Innovation Solution
A wearable article design featuring a ring-like elastic belt with front and back belts, each comprising inner and outer sheets with elastic bodies, where specific portions of the elastic bodies are removed to create 'elastic cut windows' to adjust tensile stress, providing a better fit and containment capacity without compromising economic manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic elements are secured in an elastically contractible condition in the waist and leg openings to provide full elastic fit, then fit and containment capacity are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The elastic belt is segmented into front and back belts with distinct functions. The front belt has reduced elasticity in the longitudinal direction to prevent sagging, while the back belt maintains full elasticity for fit and containment. This segmentation allows each part to perform its specific function optimally without requiring complex structures throughout the entire belt.
Solution Approach 2:
Different portions of the elastic belt have different elastic properties. The front belt is designed with non-elastic portions in the longitudinal direction to prevent sagging, while the back belt maintains elasticity. This local differentiation of material properties allows the system to achieve both sagging prevention and fit/containment without increasing overall complexity.
2Ease of manufacture
If belt-type pants are used to improve breathability and reduce manufacturing cost, then ease of manufacture and breathability are improved, but fit and containment capacity deteriorate
Solution Approach 1:
The belt is divided into front and back sections with different elastic characteristics. This segmentation allows the product to maintain the simplicity and cost-effectiveness of belt-type construction while achieving improved fit and containment through differentiated elastic properties in different regions.
Solution Approach 2:
The front belt portion has reduced longitudinal elasticity to prevent sagging, while the back belt maintains full elasticity for containment. This local quality differentiation enables belt-type pants to achieve reliable fit and containment capacity without compromising manufacturing simplicity or increasing cost.
3Reliability
If the front belt has high elasticity to provide snug fit, then fit is improved, but sagging increases
Solution Approach 1:
The front belt is designed with non-elastic portions in the longitudinal direction specifically at locations prone to sagging, while maintaining elasticity in other directions for fit. This local quality control allows the front belt to provide snug fit without the sagging problems associated with uniformly elastic materials.
Solution Approach 2:
The elastic properties of the front belt are modified by changing the elasticity parameter in the longitudinal direction to non-elastic in specific portions. This parameter change prevents sagging while the transverse elasticity is maintained for fit, resolving the contradiction between snug fit and sagging prevention.
4Ease of manufacture
If elastic bodies are distributed uniformly in the belt to provide consistent elasticity, then ease of manufacture is improved, but fit for young children's body shape deteriorates
Solution Approach 1:
The belt is segmented into front and back portions with different elastic body distributions. The front belt has reduced elasticity in the longitudinal direction, while the back belt maintains uniform elasticity. This segmentation allows adaptation to young children's body shape (bigger front belly and protruding buttock) while maintaining manufacturing simplicity through standardized construction methods.
Solution Approach 2:
Different regions of the belt have different elastic properties tailored to young children's body shape. The front belt's reduced longitudinal elasticity accommodates the bigger front belly, while the back belt's full elasticity accommodates the protruding buttock. This local quality differentiation improves adaptability without significantly complicating manufacturing.
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 design enhances fit and comfort for young children by dynamically distributing fitment forces and preventing sagging and leakage, while maintaining cost-effectiveness and breathability.
Implementation Method 1
each of the front belt and back belt are formed by an inner sheet, an outer sheet, and a plurality of elastic bodies sandwiched therebetween
Data Source
AI summary
Disclosed is a wearable article 20 comprising a main body 38 and a ring-like elastic belt 40 comprising a front belt 84 and a back belt 86 formed by a plurality of elastic bodies, at least some of the elastic bodies removed of its elasticity by an elastic cut window; the front and back belt each having a set of elastic cut windows, the transverse width of the elastic body having the longest length removed of its elasticity defined as a maximum elastic cut window 24W; wherein the maximum elastic cut window of the back belt is greater than the maximum elastic cut window of the front belt.