Laminated Blank Structure for Fully Sealed Flat-Pack Packaging
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Solution Overview
Problem
Existing packaging boxes shipped in a flat state often have unsealed bases with gaps or holes, which allow gases and liquids to traverse, making them unsuitable for food packaging that requires a fully sealed container to preserve perishable contents.
Innovation Solution
A laminated blank is formed with a thin polymer film layer and designed with fold lines and cutouts to create a fully sealed base when assembled, using a substrate like paperboard laminated with a polymer film to ensure airtight packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a blank is shipped in a flat state to save space, then shipping efficiency is improved, but the base of the assembled box has unsealed gaps or holes that allow gas and liquid penetration
Solution Approach 1:
A thin polymer film is laminated to the paperboard substrate at the base portion of the blank. This flexible film creates a continuous seal that prevents gas and liquid penetration while allowing the blank to remain flat for efficient shipping. The film conformally follows the base geometry and maintains sealing integrity when the blank is assembled into a three-dimensional box.
Solution Approach 2:
The blank combines paperboard substrate material with a laminated polymer film layer to create a composite structure. The paperboard provides structural strength and rigidity, while the polymer film provides the sealing function. This composite approach allows the base to be both structurally sound and fully sealable, eliminating gaps and holes that would otherwise allow contamination.
2Reliability
If a polymer film layer is laminated to create a sealed base, then sealing integrity is improved, but manufacturing complexity increases
Solution Approach 1:
The polymer film is laminated to the paperboard substrate before the blank is cut and formed into its final three-dimensional shape. This preliminary sealing action ensures that the film is already in place to create a continuous seal when the base is formed, eliminating the need for complex post-assembly sealing operations. The film is applied to the flat blank, then the blank is cut and folded, and finally assembled into the sealed box.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a packaging box that can be shipped flat yet assembled into a fully sealable container, suitable for food packaging by preventing gas and liquid leakage, thus extending shelf life and maintaining content integrity.
Implementation Method 1
a thin polymer film layer... such that it is formable into a pack with a base that is fully sealed by the film layer, thereby solving the technical problem of packs formed from blanks where the bases include unsealed gaps or holes
Implementation Method 2
The solution provides a packaging box that can be shipped flat yet assembled into a fully sealable container, suitable for food packaging by preventing gas and liquid leakage
Data Source
AI summary
In one aspect, a blank is formed of a substrate laminated with a thin polymer film layer. The blank includes fold lines and cutouts such that it is formable into a pack with a base that is fully sealed by the film layer, thereby solving the technical problem of packs formed from blanks where the bases include unsealed gaps or holes. In further aspects, a folded blank, packaging articles formed therefrom, and methods of manufacture are provided.