Sealed Package Stiffening Structure for Vacuum Deformation
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Solution Overview
Problem
Existing vacuum-sealed packages face issues with bending and deformation due to the upward force exerted by the cover film, which affects storage efficiency and visual appeal, and often require thicker materials to resist bending, increasing material usage and costs.
Innovation Solution
A shell design featuring a central wall with a recess and stiffening structure, including a sidewall and flange, combined with a dome-shaped bottom, to resist bending and deformation while allowing thinner materials, and a peelable barrier layer for easy separation and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thicker materials are used to resist bending, then package strength is improved, but material usage and costs increase
Solution Approach 1:
The shell is divided into multiple functional layers (base layer, barrier layer, stiffening structure) with distinct roles. The stiffening structure includes recesses and protrusions that segment the wall to provide localized support without requiring uniform thickness throughout the entire package
Solution Approach 2:
The package combines multiple materials with different properties: a base layer for structural support, a barrier layer for protection, and a stiffening structure with specific geometric features. This composite approach allows each layer to contribute its strengths while using minimal material overall
2Reliability
If vacuum sealing is applied, then product protection is improved, but package deformation increases
Solution Approach 1:
The stiffening structure with recesses and protrusions is built into the shell before vacuum sealing occurs. This pre-engineered structure counteracts the bending forces that will be applied during vacuum sealing, preventing deformation before it can occur
Solution Approach 2:
The stiffening structure incorporates curved recesses and domed features that distribute vacuum forces more evenly across the package surface. These geometric forms are inherently more resistant to uniform pressure than flat surfaces, maintaining package shape during vacuum sealing
Data Source
AI summary
A shell for holding one or more products. The shell can comprise a base layer and a barrier layer extending along at least a portion of a face of the base layer, a central wall for receiving at least a portion of the one or more products on an upper side of the central wall, and a stiffening structure extending at least partially around the central wall. The stiffening structure can be configured for resisting bending of at least a portion of the shell toward the upper side of the central wall. The stiffening structure can comprise at least a recess extending along at least a portion of the central wall.