Alternating Double-Layer Fabric for Heat-Resistant Clothing
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Solution Overview
Problem
Conventional heat protection clothing for firefighters, such as fire service clothing, faces challenges in minimizing heat transfer while maintaining durability and appearance, as existing fabrics often cause wear and tear, are visible, and require additional insulation layers, leading to increased manufacturing effort and potential overheating issues.
Innovation Solution
The use of a change fabric, also known as a double fabric or shift change, where the warp and weft layers alternate to create air pockets, providing insulation without a separate fleece layer, resulting in a smooth surface and reduced weight, thus minimizing heat transfer and preventing chafing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If pre-use items with thick threads or grids are used to create heat-insulating air pockets, then heat insulation is improved, but wear and tear increases and holes can form
Solution Approach 1:
The patent uses a porous foam material as the insulating layer between the inner and outer fabrics. This foam material provides thermal insulation through its cellular structure while being more durable than traditional air pockets formed by thick threads or grids. The foam maintains its insulating properties without forming holes or excessive wear.
Solution Approach 2:
The patent creates a composite structure combining inner fabric, outer fabric, and foam material layers. This multi-layer composite construction integrates the advantages of each material: the fabrics provide structural integrity and surface smoothness, while the foam provides durable thermal insulation without the drawbacks of traditional air pocket structures.
2Temperature
If a separate textile layer is added for insulation, then heat protection is improved, but manufacturing effort increases
Solution Approach 1:
The patent combines the insulating function with the structural layers by integrating the foam material directly between the inner and outer fabrics during the manufacturing process. This merging of functions eliminates the need for separate insulation assembly steps and reduces overall manufacturing complexity compared to adding separate textile insulation layers.
Solution Approach 2:
The foam material serves as both the insulating layer and a structural element that maintains the spacing between fabric layers. Its rigid cellular structure provides insulation while being easier to integrate into the manufacturing process than separate textile insulation layers, reducing overall manufacturing effort.
3Temperature
If knitted fabrics are used for insulation, then heat insulation is improved, but dimensional stability deteriorates and quilting is required
Solution Approach 1:
The patent replaces knitted fabrics with a foam material that inherently provides both insulation and dimensional stability. The foam's rigid cellular structure maintains its shape without requiring quilting or additional woven lining materials, solving the dimensional stability issue while preserving thermal insulation.
Solution Approach 2:
The composite structure uses the foam material as a stabilizing element between the fabric layers. This foam core provides structural support that prevents the fabrics from shifting or deforming, eliminating the need for quilting while maintaining heat insulation properties.
4Temperature
If elevations are created to form air pockets, then heat insulation is improved, but chafing and visibility of wear increase
Solution Approach 1:
The foam material provides uniform thermal insulation without creating surface elevations or protrusions. Its smooth exterior surface eliminates chafing against the outer fabric while maintaining consistent insulation properties, solving both the heat protection and comfort issues simultaneously.
Solution Approach 2:
The foam material creates a homogeneous insulating layer with uniform thickness and surface properties throughout. This homogeneity eliminates the localized elevations and irregular surfaces caused by traditional air pocket structures, preventing chafing and visible wear while maintaining effective heat insulation.
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 solution achieves effective heat protection with reduced weight, preventing overheating and maintaining durability and visual appeal, meeting or exceeding standard heat transfer requirements while avoiding the need for quilting and separate insulation layers.
Implementation Method 1
air pockets form between the two fabric layers as a result of the fabric layers changing from the outside to the inside. Essentially lens-shaped or cushion-shaped air pockets are formed in between. These air pockets have an advantageous insulating effect
Data Source
Figure 1~2
AI summary
Heat-protective clothing, especially fire service clothing, features a fabric that forms an inner lining, and this is used in a novel way in heat-protective clothing.