Airbag Coating Fabric With Thin Resin for Low Flammability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current airbag coating fabrics face challenges in achieving low burning speed and consistent flammability performance when the coated resin amount is reduced to 10 to 20 g/m2, as existing solutions either compromise on adhesion or fail to meet flammability standards.
Innovation Solution
A coating fabric with a resin coating weight of 10 to 20 g/m2 and an average resin thickness of 4.0 to 12.0 μm, using solvent-free silicone rubber and a knife coating method with specific viscosity and coating thickness coefficients, ensures low burning speed and minimal variations in both warp and weft directions, while maintaining adequate adhesion and flame-retarding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the coating amount of elastomer is reduced to 10-20 g/m2 to decrease weight and improve package ability, then the package ability and weight are improved, but the burning speed increases and flammability performance deteriorates
Solution Approach 1:
The patent applies local quality by creating different resin thickness zones: a first resin thickness of 4.0-12.0 μm in the top area and a second resin thickness of 2.0-8.0 μm in the base area. This non-uniform distribution allows the top surface to achieve low burning speed while the overall coating weight remains reduced to 10-20 g/m2, resolving the contradiction between weight reduction and flammability performance.
Solution Approach 2:
The patent changes the parameter of resin thickness distribution from uniform to non-uniform, with specific control over average resin thickness in different areas. By controlling the average resin thickness in the top area to 4.0-12.0 μm while maintaining overall coating weight of 10-20 g/m2, the patent achieves both weight reduction and satisfactory flammability performance.
2Weight of moving object
If the coating amount of elastomer is reduced to 10-20 g/m2 to improve package ability, then the package ability is improved, but the adhesion between fabric and resin deteriorates
Solution Approach 1:
The patent applies local quality by creating different resin thickness zones: a first resin thickness of 4.0-12.0 μm in the top area and a second resin thickness of 2.0-8.0 μm in the base area. This non-uniform distribution allows the top surface to achieve low burning speed while the overall coating weight remains reduced to 10-20 g/m2, resolving the contradiction between weight reduction and flammability performance.
Solution Approach 2:
The patent changes the parameter of resin thickness distribution from uniform to non-uniform, with specific control over average resin thickness in different areas. By controlling the average resin thickness in the top area to 4.0-12.0 μm while maintaining overall coating weight of 10-20 g/m2, the patent achieves both weight reduction and satisfactory flammability performance.
3Weight of moving object
If the resin coating is made thin to reduce coating weight, then the package ability is improved, but the resin coating becomes prone to breakage
Solution Approach 1:
The patent applies local quality by creating different resin thickness zones: a first resin thickness of 4.0-12.0 μm in the top area and a second resin thickness of 2.0-8.0 μm in the base area. This non-uniform distribution allows the top surface to achieve low burning speed while the overall coating weight remains reduced to 10-20 g/m2, resolving the contradiction between weight reduction and flammability performance.
Solution Approach 2:
The patent applies beforehand cushioning by providing a thicker resin layer in the base area (second resin thickness of 2.0-8.0 μm) that serves as a cushioning layer. This base area resin coating prevents breakage propagation from the knotted areas to the top surface, allowing the use of thinner resin coating overall while maintaining coating integrity.
Data Source
AI summary
The present invention provides a coating fabric for airbags where an elastomer is coated to at least one side of textile constituted from synthetic fiber filament, which is characterized in that the coating weight of the resin is as small as 10 to 20 g/m2 and an average resin thickness of the head top in the textile surface is 4.0 μm to 12.0 μm in both directions of warp and weft and that the average value of burning speed measured according to FMVSS 302 is not more than 60 mm/min in both directions of warp and weft and the maximum value thereof is not more than 1.2-fold to the average value in both directions of warp and weft.