Inflatable Packaging with Non-Continuous Longitudinal Channels
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Solution Overview
Problem
Inflatable cellular cushioning products, such as BubbleWrap, have low product density, leading to high shipping costs due to their low volume-to-weight ratio, and existing inflatable packaging materials that are interconnected can fully deflate if one chamber ruptures, losing their cushioning effect.
Innovation Solution
An inflatable web with non-continuous longitudinal channels is created by using a pattern of continuous and intermittent side seals, allowing gas to pass between chambers on either side of intermittent seals but not across continuous seals, providing semi-rigidity and preventing complete deflation if one chamber ruptures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If chambers are interconnected to allow gas flow, then ease of inflation is improved, but reliability deteriorates because one rupture causes complete deflation
Solution Approach 1:
The inflatable web is segmented into multiple chambers separated by continuous side seals, with each chamber containing cells that are interconnected within the chamber but isolated from other chambers. This segmentation ensures that a rupture in one chamber does not affect other chambers, maintaining reliability while allowing gas flow within each chamber for ease of inflation.
2Reliability
If continuous side seals are used to separate chambers, then reliability is improved by preventing complete deflation, but device complexity increases due to intermittent seal patterns
Solution Approach 1:
The side seals are segmented into continuous portions that separate chambers and intermittent portions that allow gas flow within a chamber. This segmentation pattern (continuous-intermittent-continuous) provides both chamber separation for reliability and internal connectivity for ease of inflation, while the repeating pattern manages complexity.
Solution Approach 2:
The side seals follow a periodic pattern of continuous and intermittent sections along the longitudinal direction, creating regularly spaced chambers with predictable gas flow paths. This periodic structure simplifies manufacturing and design while achieving the desired balance between reliability and ease of inflation.
3Strength
If non-continuous longitudinal channels are created, then rigidity is improved in longitudinal direction, but manufacturing precision requirements increase
Solution Approach 1:
The longitudinal channels are segmented into discrete sections separated by continuous side seals, creating a series of isolated gas pockets along the longitudinal direction. This segmentation provides rigidity at specific locations while allowing flexibility elsewhere, and the segmented structure is more tolerant to manufacturing variations than continuous channels.
Data Source
AI summary
An inflatable web includes two juxtaposed sheets, seals between the sheets that define chambers, and two longitudinal edges. The chambers extend in a transverse direction between the two longitudinal edges. The seals include side seals that extend between the two longitudinal edges. The side seals include a two intermittent side seals and a continuous side seal. Each of the intermittent side seals includes side seal portions and gaps between the side seal portions. The gaps permit gas to pass between chambers on either side of the intermittent side seals. The continuous side seal is located between the two intermittent side seals. The continuous side seal does not permit gas to pass between chambers on either side of the continuous side seal. The gaps in the two intermittent side seals are aligned a longitudinal direction to form a non-continuous longitudinal channel across the continuous side seal.