Airbag Weaving Pattern for Border Airtightness
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Solution Overview
Problem
Airbag airtightness is compromised due to thread displacement at the border between the inflated bag portion and the non-inflatable plain cloth portion, leading to increased material thickness and production costs when attempting to address this issue.
Innovation Solution
A specific weaving pattern is implemented for the airbag, where the bag portion is woven using double weave and the plain cloth portion using plain weave, with constraints on warp and filling thread intersections to minimize thread displacement, ensuring airtightness without increasing the silicone film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the silicone film on the airbag surface is increased to prevent thread displacement and maintain airtightness, then the airtightness is improved, but the production cost increases due to larger material requirements
Solution Approach 1:
The invention changes the weaving parameters (pattern, density, and configuration of warp and filling threads) at the border region between the bag portion and plain cloth portion. By adjusting these parameters to create a tighter interlacing pattern, the structural integrity is improved, preventing thread displacement without requiring increased film thickness, thus resolving the contradiction between airtightness and material quantity.
2Ease of operation
If a larger number of warp floats and weft floats are present in the weaving pattern, then the flexibility and comfort of the airbag is improved, but the displacement of threads is more likely to occur compromising airtightness
Solution Approach 1:
The invention applies different weaving characteristics to different regions of the airbag. The bag portion uses a pattern with more floats for flexibility and comfort, while the border region uses a tighter interlacing pattern with fewer consecutive floats to prevent thread displacement. This local differentiation resolves the contradiction between flexibility and airtightness by optimizing each region for its specific function.
Data Source
AI summary
An airbag includes a bag portion and a plain cloth portion. The bag portion is woven by double weave. The plain cloth portion is woven by plain weave at an edge of the bag portion. The bag portion and the plain cloth portion include warp threads and filling threads. The bag portion and the plain cloth portion are woven by a one piece woven method to satisfy: (1) each warp thread is not over four consecutive filling threads and each filling thread is not over four consecutive warp threads around a border between the bag portion and the plain cloth portion; and (2) every two adjacent warp threads are not over two adjacent filling threads and every two adjacent filling threads are not over two adjacent warp threads around the border.