Flexible Container Tapered Seal Stability
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Solution Overview
Problem
Self-standing flexible containers (SUPs) with increased aspect ratios face challenges in maintaining stability and drop strength, which are essential for retail, commercial, and household use without degrading in performance.
Innovation Solution
The flexible container design features gusseted side panels with peripheral seals that include a body seal inner edge, a bottom tapered seal inner edge, and a top tapered seal inner edge, where the top tapered seal inner edge is at least 1.1 times longer than the body seal inner edge, enhancing stability and drop resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the aspect ratio of the flexible container is increased to improve shelf space utilization and advertising area, then the container height increases, but the stability and drop strength of the container deteriorates
Solution Approach 1:
The patent applies local quality by creating a tapered seal structure where the seal width varies along its length. The seal is narrower at the top and wider at the bottom, concentrating structural reinforcement where it is most needed for stability. This localized variation in seal geometry allows the container to achieve higher aspect ratios while maintaining bottom-heavy stability characteristics that prevent tipping.
Solution Approach 2:
The patent changes the geometric parameters of the seal structure by defining specific dimensional relationships: the top tapered seal inner edge length is at least 1.1 times the body seal inner edge length. This parameter modification transforms the seal from a uniform structure to a tapered one, fundamentally changing how the container distributes structural strength and achieves stability at higher aspect ratios.
2Volume of moving object
If the aspect ratio of the flexible container is increased to improve shelf space utilization and advertising area, then the container height increases, but the drop strength of the container deteriorates
Solution Approach 1:
The tapered seal structure concentrates material and structural strength at the bottom portion of the container where impact forces are most likely to occur during drops. By making the seal wider at the bottom and narrower at the top, the design locally reinforces the area most vulnerable to drop damage while maintaining overall container flexibility.
Solution Approach 2:
The tapered seal design inherently provides cushioning against drop impacts by creating a gradual transition in seal thickness. The wider bottom portion acts as a buffer zone that absorbs impact energy before it reaches the main container body, protecting the container from breakage or leakage during drops.
3Volume of moving object
If the seal structure is modified to increase aspect ratio, then the container height-to-width ratio improves, but the manufacturing complexity increases
Solution Approach 1:
The seal is segmented into three distinct geometric zones: the body seal inner edge portion, the top tapered seal inner edge portion, and the bottom tapered seal inner edge portion. This segmentation allows each zone to be optimized independently for its specific function while maintaining overall manufacturability through standardized forming processes.
Solution Approach 2:
The patent introduces asymmetry into the seal structure by creating unequal tapering: the top tapered portion has a length of at least 1.1 times the body seal inner edge length, while the bottom tapered portion extends to form a flat base. This asymmetric design achieves the desired aspect ratio improvement while maintaining manufacturing feasibility through controlled geometric variations.
Data Source
AI summary
The present disclosure provides a flexible container. In an embodiment, the flexible container includes (A) a front panel, a rear panel, a first gusseted side panel, and a second gusseted side panel. The gusseted side panels adjoin the front panel and the rear panel along peripheral seals to form a chamber. (B) Each peripheral seal has (i) a body seal inner edge (BSIE) with a bottom end and an opposing top end, (ii) a bottom tapered seal inner edge (b-TSIE) extending from the BSIE bottom end, and (iii) a top tapered seal inner edge (t-TSIE) extending from the BSIE top end. (C) The t-TSIE has a length that is at least 1.1 times greater than the length of the BSIE (in mm).