Apparel Auxetic Layer Four-Way Stretch Fit
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Solution Overview
Problem
Designing closely fitting garments that accommodate varying body shapes and sizes, as well as double curvature surfaces, is challenging due to individual differences in measurements, leading to discomfort, wear, or creasing issues.
Innovation Solution
Incorporating a base layer with a four-way stretch material and an auxetic layer featuring a repeating pattern of voids or a near auxetic structure with interconnected members, allowing the garment to conform to different shapes and curvatures without wrinkling or folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a garment is designed to fit closely to the human body, then the fit and comfort are improved, but it becomes difficult to accommodate different body shapes and sizes within the same size range
Solution Approach 1:
The patent applies dynamics by using materials with four-way stretch capability that can dynamically adapt to different body shapes and sizes. The fabric's elastic properties allow it to stretch and conform to various contours while maintaining a close fit, enabling the same garment size to accommodate different individuals effectively
Solution Approach 2:
The patent utilizes parameter changes by incorporating materials with varying elastic properties and Poisson's ratios. The four-way stretch material and auxetic layer change their physical parameters (stretchability, compression resistance) to adapt to different body measurements, allowing the garment to maintain proper fit across different body types within a size range
2Reliability
If a garment is designed to conform to double curvature surfaces, then the fit and appearance are improved, but the garment may experience bending or creasing at poorly fitting locations
Solution Approach 1:
The patent employs flexible shells and thin films by using a four-way stretch material that can bend and conform to double curvature surfaces without creasing. The material's flexibility and elastic recovery allow it to adapt to complex body contours while maintaining a smooth appearance and preventing harmful creasing
Solution Approach 2:
The patent uses composite materials by combining a four-way stretch base layer with an auxetic layer. This composite structure provides both the flexibility needed to conform to double curvatures and the structural support to prevent creasing and bending, resolving the contradiction between conformity and crease prevention
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 combination of materials provides a comfortable, secure fit across various body shapes and sizes, maintaining flexibility and preventing creasing, while being relatively inexpensive and easy to manufacture.
Implementation Method 1
an auxetic layer coupled to the base layer, the auxetic layer comprising an auxetic structure defining a repeating pattern of voids
Implementation Method 2
an auxetic layer featuring a repeating pattern of voids or a near auxetic structure with interconnected members
Implementation Method 3
a base layer comprising a four way stretch material
Data Source
AI summary
An article of apparel includes a first layer and a second layer. The first layer includes a four way stretch material. The second layer, coupled to the first layer, includes an auxetic layer.