Overlapping Insulation Packs for Cold Weather Garment Heat Retention
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Solution Overview
Problem
Existing cold weather clothing, such as down jackets, experience a decrease in heat retention at joint parts (seams) due to the filling material not being disposed or the fabric being crushed, leading to inferior heat retention compared to other parts of the garment.
Innovation Solution
The clothing incorporates a configuration where down areas are divided into packs that overlap on the same surface, forming dead air pockets that enhance heat retention at joint parts. Additionally, mesh areas and cotton areas are strategically placed to improve air permeability and maintain warmth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the top fabric and backing fabric are sewn together to form a bag-like pack for enclosing filling material, then the clothing provides excellent heat retention overall, but the heat retention at the joint parts (seams) decreases due to fabric crushing and absence of filling material
Solution Approach 1:
The invention divides the seam structure into multiple layers (top fabric, middle fabric, backing fabric) with the filling material disposed between them. The seam is segmented such that the filling material is positioned at specific locations between fabric layers rather than being completely excluded by the stitching process, thereby maintaining heat retention at joint parts while preserving the overall bag-like pack structure.
Solution Approach 2:
The invention applies different structural qualities to different locations: at the joint parts, the filling material is deliberately disposed between fabric layers to maintain local thickness and heat retention, while in other areas the filling material is enclosed in the typical bag-like structure. This local differentiation ensures optimal thermal performance at critical seam areas without compromising the overall design.
2Ease of manufacture
If the filling material is enclosed in a bag-like pack formed by sewing fabrics together, then the clothing structure is simple and manufacturing is easy, but the heat retention at joint parts deteriorates due to fabric crushing and filling material absence
Solution Approach 1:
The invention performs preliminary action by pre-positioning the filling material between fabric layers at locations where seams will be formed, before the final stitching process. This ensures that even when fabrics are sewn together, the filling material remains in place at critical thermal areas, maintaining heat retention without requiring complex post-manufacturing adjustments.
Solution Approach 2:
The invention introduces an intermediary layer (middle fabric) between the top fabric and backing fabric at seam locations. This middle fabric layer acts as a mediator that helps maintain the structural integrity of the seam while preserving the filling material's position and thermal insulation properties, facilitating easier manufacturing without sacrificing heat retention.
3Adaptability or versatility
If seams are provided at various positions to join fabrics, then the clothing structure is flexible and adaptable, but the heat retention at these joint parts becomes inferior compared to non-joint parts
Solution Approach 1:
The invention applies local quality by implementing a specialized multi-layer structure with filling material at seam locations, while maintaining the flexibility to position seams at various locations across the garment. Each seam area receives enhanced thermal protection through the localized presence of filling material between fabric layers, allowing the overall design to remain adaptable while ensuring consistent heat retention at all joint parts.
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 significantly improves heat retention at joint parts, maintaining high warmth even in low temperatures, while also enhancing air permeability to prevent moisture buildup and maintain comfort.
Implementation Method 1
a first pack and a second pack are disposed to overlap each other in a clothing. An area between the first pack and the second pack when viewed inward and outward on the inner fabric of the first pack is a dead air
Data Source
AI summary
In a clothing, inside which a plurality of packs are disposed, the plurality of packs are disposed on the same surface and disposed to partially overlap each other. The plurality of packs include a first pack and a second pack disposed immediately above the first pack, and an upper joining line defining an upper side of the first pack on the same surface is above a lower end of the second pack.