Firefighter Body Protector with Segmented Stiffening and Flameproof Layer
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Solution Overview
Problem
Existing body protectors do not provide adequate protection against both mechanical injuries and high temperatures, particularly in applications where firefighters may encounter both physical hazards and extreme heat.
Innovation Solution
A body protector design featuring a flameproof outer layer made of materials like aramides, Kevlar, or Nomex, with adjustable and plate-shaped stiffening means for enhanced impact resistance and mobility, integrated with breathable materials, air ducts for heat dissipation, and micro-craters for improved shock absorption and air circulation, along with a closure system for attaching equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hard shell and cushioning padding are used to provide mechanical protection, then protection against mechanical injuries is improved, but protection against high temperatures is not provided
Solution Approach 1:
The body protector combines multiple materials with different properties: a hard shell (polycarbonate, polyethylene, or aramid) for mechanical protection, flame-retardant soft padding (viscose, cotton, or aramid) for thermal protection, and silicone coating for additional heat resistance. This composite structure simultaneously provides both mechanical and thermal protection.
2Strength
If stiffening means are added to enhance impact resistance, then mechanical strength is improved, but mobility is reduced
Solution Approach 1:
The stiffening means are divided into multiple individual elements (ribs or plates) spaced apart from each other, rather than using a single continuous rigid structure. This segmentation maintains necessary mechanical strength while allowing flexibility and mobility in the protected areas.
Solution Approach 2:
The stiffening means are strategically positioned only in areas requiring enhanced impact resistance, while other areas maintain flexibility. The plate-shaped stiffeners with spacing provide localized reinforcement without compromising overall mobility.
3Temperature
If flameproof materials are used for the outer layer, then thermal protection is improved, but breathability is reduced
Solution Approach 1:
The outer layer incorporates breathable flameproof materials such as aramid fabrics (Kevlar, Nomex) or flame-retardant viscose and cotton that maintain porosity for air circulation while providing thermal and flame protection. The porous structure allows sweat vapor and air to pass through while blocking external heat and flames.
4Reliability
If the body protector is designed to protect against both mechanical and thermal threats, then comprehensive protection is improved, but device complexity increases
Solution Approach 1:
The body protector is designed as a multi-functional garment that simultaneously provides mechanical impact protection, thermal protection, and flame resistance through its layered composite structure. The same structure serves multiple protective functions rather than requiring separate equipment for each hazard type.
Data Source
Figure 1~3
AI summary
The body protector (1) comprises a resilient padding portion (4) in or on which less-resilient reinforcement devices (5,6) are arranged. An outer layer (2) is formed on the padding portion and is made of stable-temperature heat-resistant material. The reinforcement devices are formed from metal or hard plastic. The outer layer is designed as film or textile. An interconnection layer (3) is formed between the outer layer and padding portion.