Aircraft Insulating Bag With Mono-Material Reinforced Foil
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Solution Overview
Problem
Conventional aircraft insulation using glass wool and multilayer foils adds significant weight, negatively impacting fuel consumption due to the use of multiple materials bonded with adhesive films.
Innovation Solution
An insulating bag comprising a thermoplastic polymer foil and fibre reinforcement made from the same polymer, eliminating the need for adhesive films and allowing for recycling and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional multilayer foil with adhesive films is used to reinforce insulation, then mechanical strength and resilience are improved, but weight increases significantly
Solution Approach 1:
The patent removes the adhesive film layer from the conventional multilayer insulation structure. Instead of using adhesive to bond the foil to the insulation material, the foil is directly wrapped around the insulation material, eliminating the need for adhesive films and reducing overall weight while maintaining mechanical integrity through proper wrapping and sealing.
Solution Approach 2:
The patent uses a composite structure consisting of a thermoplastic foil and insulation material (glass wool or similar). The thermoplastic foil provides mechanical protection and can be heat-sealed to create a self-contained insulating bag, combining the insulating properties of the porous material with the structural properties of the thermoplastic layer without requiring additional adhesive materials.
2Strength
If multiple different materials are bonded together to create reinforced insulation foil, then mechanical resilience is improved, but recyclability deteriorates
Solution Approach 1:
The patent employs a homogeneous material approach by using a single thermoplastic material for the foil that can be heat-sealed to itself. This single-material construction allows the entire foil structure to be recycled together without the complications of separating different materials and adhesives, maintaining both mechanical resilience through proper sealing and full recyclability.
Solution Approach 2:
The thermoplastic foil can be easily discarded and recovered through recycling processes. Since the foil is made from a single thermoplastic material without adhesive contamination, it can be efficiently processed in standard thermoplastic recycling streams, recovered, and reused to create new insulation components, supporting circular economy principles in aircraft manufacturing.
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 provides lightweight insulation with high mechanical resilience, reducing overall weight and enabling easy recycling while maintaining tensile strength and thermal/acoustic performance.
Implementation Method 1
the packaging foil comprises a thermoplastic polymer foil and a fibre reinforcement made from the same thermoplastic polymer as the foil
Data Source
Figure 1~2
Figure 3~4
AI summary
The present disclosure relates to an insulating bag (100) for an aircraft. The insulating bag (100) comprises an insulation material (150) and a packaging foil (110) that comprises a thermoplastic polymer foil (113) and a fibre reinforcement (115) made from the same thermoplastic polymer as the foil (113). Further disclosed are an aircraft having such insulating bag (100) and a method of producing such insulating bag (100).