Non-Conductive Balloon with Encapsulated Metallized Layer
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Solution Overview
Problem
Non-latex balloons with metalized layers have high electrical conductivity, leading to issues such as entanglement in power lines and reduced barrier properties due to mechanical property differences between polymer and metalized layers, resulting in shorter inflated life and seam failures.
Innovation Solution
A multilayer balloon construction where a metalized layer is encapsulated between an elastomeric sealant layer and a polymeric film, with an optional primer to improve adhesion, reducing electrical conductivity by at least five magnitudes and enhancing bond and seal strengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metalized layer is used in non-latex balloons, then barrier properties towards water and gases are improved, but electrical conductivity increases causing entanglement in power lines
Solution Approach 1:
The metalized layer is nested between an elastomeric sealant layer and a polymeric film layer, creating a multi-layer construction where the metal layer is encapsulated. This nesting approach allows the metalized layer to provide barrier properties while being isolated from external contact, thereby reducing electrical conductivity and preventing entanglement in power lines.
Solution Approach 2:
An elastomeric sealant layer is introduced as an intermediary between the metalized layer and the outer polymeric film. This intermediary layer acts as an electrical insulator, reducing the overall electrical conductivity of the balloon while allowing the metalized layer to maintain its barrier functionality.
2Strength
If a higher modulus, more stretch resistant polymeric film is used, then crack resistance is improved, but seam failure and film cracking increase due to concentrated force
Solution Approach 1:
The elastomeric sealant layer is applied specifically at the seam areas and over the metalized layer, providing localized flexibility and stress distribution. This local quality approach allows the sealant to accommodate stress concentrations at seams while the overall film structure maintains its crack resistance.
Solution Approach 2:
The balloon construction uses a composite material structure combining polymeric film, elastomeric sealant layer, and metalized layer. This composite construction leverages the complementary properties of each material: the polymeric film provides overall strength and crack resistance, the elastomeric sealant provides flexibility and stress distribution at seams, and the metalized layer provides barrier properties.
3Object-affected harmful factors
If the metalized layer is exposed on the outer surface, then electrical conductivity is high, but barrier properties are reduced due to mechanical property differences
Solution Approach 1:
The metalized layer is nested within the multi-layer construction rather than being exposed on the outer surface. This nesting protects the metal layer from direct mechanical stress and environmental exposure, maintaining its barrier properties while reducing overall electrical conductivity through the insulating elastomeric and polymeric layers.
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 achieves significant reduction in electrical conductivity, increased float life, improved scuff resistance, and robust bonds and seals, resulting in balloons with extended helium retention and improved mechanical integrity.
Implementation Method 1
encapsulating the metal layer between insulating elastomeric polymer film layer such that the electrical conductivity of the finished balloon is reduced by at least 5 magnitudes (105)
Implementation Method 2
incorporates a primer that improves the adhesion between the elastomeric sealant and metalized layers
Data Source
AI summary
The present invention relates to articles and methods for producing non-latex balloons with low surface electrical conductivities and an extended product life. In a preferred embodiment, a multilayer composite film having an exposed metallized layer is coated with an elastomeric sealant layer that increases electrical resistivity of the balloon product to greater than 1.08 Ohms/sq. The invention relates to articles and methods for producing needed bonds and seal strength required to manufacture non latex balloons. The balloons of this invention have an extended product life because they are more resistant to common defects like pin holing and stress cracks than conventional balloon systems.