Bi-directional Inflatable Cushion Angled Perforations
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Solution Overview
Problem
Existing inflatable flexible structures, such as air cushions, tend to tear undesirably due to perforations that are not evenly distributed or oriented, lacking strength in both transverse and longitudinal directions, which complicates their separation and usage in packaging applications.
Innovation Solution
The development of inflatable cushions with bi-directional polymer materials that include multiple layers, such as a seal layer and a gas barrier layer, and specific perforation designs like chevron-shaped slits, which facilitate tearing along intended lines of weakness while maintaining structural integrity in both directions, allowing for easy separation and effective fluid retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional perforations are used in inflatable flexible structures, then separation is facilitated, but the structure tears in undesirable directions and loses strength
Solution Approach 1:
The perforations are segmented into multiple discrete openings arranged in patterns rather than continuous lines, creating controlled weak points that guide tearing while preserving overall structural strength. The perforations are distributed throughout the material in a systematic arrangement that maintains integrity between tear lines.
Solution Approach 2:
The perforation patterns incorporate asymmetric designs including chevron shapes, angled orientations, and non-uniform distributions that prevent symmetric tearing paths. This asymmetry directs tears along intended separation lines while preventing undesirable radial or random tearing patterns that would compromise structural strength.
2Ease of operation
If perforations extend completely across the structure, then separation is achieved, but the structure lacks strength in both transverse and longitudinal directions
Solution Approach 1:
The perforations are strategically localized in specific regions and patterns rather than uniformly distributed. Different areas of the material have different perforation densities and configurations, creating local weak points for separation while maintaining overall structural strength in both transverse and longitudinal directions through optimized placement.
Solution Approach 2:
The perforation design incorporates multi-dimensional patterns including angled orientations, chevron shapes, and three-dimensional spatial arrangements that control tearing in multiple directions simultaneously. This dimensional complexity allows the structure to maintain strength while enabling separation through controlled tear propagation along predetermined paths.
3Ease of operation
If perforations are oriented only in one direction, then tearing is facilitated in that direction, but the structure lacks bi-directional strength
Solution Approach 1:
The perforation patterns are designed to serve multiple functions simultaneously: they facilitate tearing in controlled directions while maintaining structural strength in both transverse and longitudinal directions. The multi-functional design includes perforations that guide tears, distribute stress, and preserve integrity across different orientation axes.
Solution Approach 2:
The structure employs composite perforation patterns combining different orientations, shapes, and densities of perforations within the same material layer. This composite approach creates a unified system that achieves both tear facilitation and bi-directional strength through the synergistic interaction of diverse perforation elements.
Data Source
AI summary
The present disclosure relates to inflatable cushions. The inflatable cushions may include a first ply extensive in longitudinal and transverse directions, and a second ply extensive in the longitudinal and transverse directions. The second ply may be overlayed on and sealed to the first ply such that the plies define therebetween a plurality of inflation chambers. The inflation chambers may be inflatable with a fluid and operable to contain the fluid. At least the first or second ply may include a layer of a first polymer material that has a bi-directional orientation. One or more lines of weakness may be formed by a plurality of perforations that facilitate tearing through the plies to separate portions of the inflatable cushion. At least one of the perforations may have a tip that is oriented at an angle displaced to the transverse direction.