Non-woven Fire Barrier Mat for Aircraft Insulation
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Solution Overview
Problem
Commercial aircraft insulation blankets face challenges in meeting regulatory requirements for burnthrough resistance, weight, and cost, with existing solutions either being too heavy or failing to pass stringent FAA burnthrough tests.
Innovation Solution
A lightweight non-woven mat composed of fine and coarse glass fibers, with a binder system including vinyl and strengthening components, is developed using a wet lay process, which provides enhanced mechanical integrity and burnthrough resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If lightweight materials are used to reduce weight, then weight is reduced, but burnthrough resistance deteriorates
Solution Approach 1:
The patent uses a composite nonwoven mat combining fine glass fibers (providing burnthrough resistance) with organic fibers (providing lightweight properties and mechanical strength). This composite structure allows the material to achieve both lightweight characteristics and high burnthrough resistance, resolving the contradiction between reducing weight and maintaining reliability.
2Reliability
If material thickness is increased to improve burnthrough resistance, then burnthrough resistance is improved, but weight increases
Solution Approach 1:
The patent applies local quality by using fine glass fibers specifically in regions where burnthrough resistance is critical, while incorporating lightweight organic fibers in other areas. The fine fibers provide concentrated burnthrough protection without requiring overall thickness increase, thus maintaining lightweight properties while achieving high burnthrough resistance.
3Reliability
If fine fibers are used to improve burnthrough resistance, then burnthrough resistance is improved, but mechanical integrity deteriorates
Solution Approach 1:
The patent merges fine glass fibers (providing burnthrough resistance) with organic fibers (providing mechanical strength and structural integrity). The organic fibers act as a structural framework that maintains mechanical integrity, while the fine glass fibers provide burnthrough protection. This combination resolves the contradiction between improving burnthrough resistance and maintaining mechanical strength.
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 solution effectively passes the FAA insulation burnthrough test, offering improved mechanical integrity and thermal stability while maintaining a low weight, thus meeting aircraft manufacturer and regulatory expectations.
Implementation Method 1
forming a mat of the fine and coarse glass fibers using a wet lay process
Implementation Method 2
drying the mat
Implementation Method 3
a binder including a vinyl component and a strengthening component
Data Source
AI summary
Methods of making the burnthrough resistant non-woven mat include forming the mat from glass fibers and at least two binders, a first binder having a vinyl component and a second binder having a strengthening component. The vinyl component may be, for example, ethylene vinyl chloride, and the strengthening component may be, for example, melamine formaldehyde. In one method, the vinyl component is added to the glass fibers by a beater addition process and the strengthening component is sprayed onto the glass fibers. The burnthrough resistant non-woven mat may be used in conjunction with an insulation blanket, and may be especially suited to use in insulating aircraft.