Airbag Cushion Reinforcing Fabric Parameter Optimization
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Solution Overview
Problem
Existing airbag cushions face issues with mechanical strength, puncture resistance, and storage efficiency due to the use of general-purpose yarns like PA66 or polyester, which lead to performance degradation and increased weight and cost when reinforced with thick coated fabrics or multiple layers.
Innovation Solution
A reinforcing fabric with polyester yarns having specific tenacity, elongation at specific load, and dimensional stability is developed, which is attached to the airbag cushion to enhance its impact mitigation and occupant restraint performance while maintaining lightweight and foldable properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick coated fabric or multiple layers of reinforcing fabric are used to protect fragile areas, then puncture resistance and mechanical strength are improved, but the airbag cushion becomes difficult to fold and the roll diameter increases
Solution Approach 1:
The patent changes the material parameters by using high-strength yarns with specific tenacity (8.0 g/d or more) and elongation at specific load (3.0 to 6.0%) to achieve the required puncture resistance with a single layer of fabric, eliminating the need for multiple layers or thick coatings that would hinder folding.
Solution Approach 2:
The patent employs composite material structure by combining polyester yarns with specific mechanical properties in a woven fabric configuration, creating a single-layer reinforcing fabric that provides both protection and foldability through optimized material composition and structure.
2Strength
If thick coated fabric or multiple layers of reinforcing fabric are used to protect fragile areas, then impact mitigation performance is improved, but the weight of the airbag cushion increases
Solution Approach 1:
The patent optimizes the mechanical parameters of the yarn (tenacity of 8.0 g/d or more, elongation at specific load of 3.0 to 6.0%) to achieve superior impact mitigation performance with minimal fabric weight, eliminating the need for additional weight through multiple layers or thick coatings.
3Ease of manufacture
If general-purpose yarns such as PA66 or polyester are used for reinforcing fabric, then ease of manufacture is improved, but mechanical strength and puncture resistance are insufficient
Solution Approach 1:
The patent specifies precise parameter ranges for the polyester yarns (tenacity of 8.0 g/d or more, elongation at specific load of 3.0 to 6.0%, finished fabric construction of at least 24 yarns per inch) that balance ease of manufacture with superior mechanical strength and puncture resistance, moving beyond general-purpose specifications.
4Reliability
If multiple layers of reinforcing fabric are used to protect fragile areas, then damage prevention is improved, but the roll diameter in folded state increases interfering with storage
Solution Approach 1:
The patent achieves enhanced damage prevention through optimized single-layer fabric parameters (yarn tenacity of 8.0 g/d or more, elongation at specific load of 3.0 to 6.0%, fabric construction of at least 24 yarns per inch), which provides sufficient protection while maintaining a compact folded size suitable for storage.
Data Source
AI summary
The present application relates to an airbag cushion comprising the reinforcing fabric and a method for preparing the same. According to the present application, adequate levels of tenacity, elongation, dimensional stability, impact resistance and the like required for an airbag cushion and its reinforcing fabric are simultaneously met.