Multilayer Packaging Blank for Clean-Cut Reusable Openings
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Solution Overview
Problem
Existing pourable product packages face challenges in reducing plastic consumption by incorporating reusable opening devices, ensuring a clean cut without fraying, and preventing inadvertent rupture during storage and transportation.
Innovation Solution
A packaging blank with a multilayer structure featuring a base layer, lamination layers, and a separation membrane, incorporating a pre-laminated opening with defined lines of weakness for a reusable opening device, ensuring tight adhesion and clean cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a reusable opening device is incorporated into the package, then plastic consumption is reduced and sustainability is improved, but the package structure becomes more complex and may cause liquid leakage during pouring
Solution Approach 1:
The package structure is segmented into distinct functional layers: a base layer for structural support, lamination layers for barrier properties, and a separation membrane for controlled opening. This segmentation allows each layer to perform its specific function while working together to enable reusable opening devices without compromising package integrity or causing leakage
Solution Approach 2:
A separation membrane is introduced as an intermediary element between the package contents and the opening device. This membrane facilitates the interaction between the reusable opening device and the package while maintaining liquid containment, enabling the device to be reused multiple times without causing leakage or compromising the package structure
2Ease of operation
If a pre-laminated opening is provided for a reusable opening device, then the opening device can be tightly received, but the cutting edge may fray and interfere with pour-out
Solution Approach 1:
The packaging material exhibits local quality variations through its multilayer construction, with each layer having specific properties optimized for its function. The separation membrane has localized characteristics that facilitate clean cutting and prevent fraying at the opening edge, while maintaining tight adhesion to receive the opening device securely
Solution Approach 2:
The package employs composite materials consisting of multiple layers with different properties: the base layer provides structural support, the lamination layers provide barrier properties, and the separation membrane provides controlled opening characteristics. This composite structure enables both tight reception of the opening device and clean cutting without fraying
3Manufacturing precision
If the separation membrane is made thin for clean cutting, then cutting precision is improved, but the membrane may inadvertently rupture during storage and transportation
Solution Approach 1:
The separation membrane is constructed as a composite material with carefully selected thickness and composition that balances cuttability with structural integrity. The multilayer composite structure allows the membrane to be thin enough for clean cutting by the opening device while remaining strong enough to resist inadvertent rupture during storage and transportation
Solution Approach 2:
The physical parameters of the separation membrane, particularly its thickness and material composition, are optimized to achieve the desired balance between cut quality and structural integrity. By adjusting these parameters, the membrane can be made thin enough for clean cutting while maintaining sufficient strength to prevent rupture under normal storage and handling conditions
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
Enables efficient use of reusable opening devices with minimal liquid leakage and controlled rupture, enhancing sustainability and usability of pourable product packages.
Implementation Method 1
The packaging material has a multilayer structure comprising a base layer, e.g. of paper, covered on both sides with layers of heat-seal plastic material
Implementation Method 2
layers of heat-seal plastic material, e.g. polyethylene
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
There is described a packaging blank (2, 2', 2'', 2‴) comprising one base layer (3) for imparting stiffness, a plurality of lamination layers (4) applied to and covering both sides of the base layer (3), an opening (9) which is formed by a through slot provided in the base layer (3) and a separation membrane (10) covering the opening (9). The opening (9) extends along a first axis (F) and a second axis (G) perpendicular to the first axis (F). A first extension (E1) of the opening (9) along the first axis (F) is larger than a second extension (E2) along the second axis (G). The opening (9) comprises a first end (17) and a second end (18) distanced from one another along the first axis (F), a first line of weakness (11) and a second line of weakness (12). Both the first line of weakness (11) and the second line of weakness (12) extend away from the opening (9).