Multilayer Package Opening Device Guiding Rupture
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Solution Overview
Problem
Existing package containers with opening devices hinder production speed and increase costs due to inefficiencies in material usage and production time.
Innovation Solution
A multilayer package material structure with weakening lines and a plastic opening device featuring a guiding section that extends between the weakening lines to facilitate controlled rupture, reducing the likelihood of deviation and requiring less force for opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional opening devices are used in package containers, then consumer opening is facilitated, but production speed is hampered and production costs increase
Solution Approach 1:
The opening device is segmented into distinct functional portions: a first portion attached to the package exterior, a second portion attached to the package interior, and a material bridge connecting them through the package wall. This segmentation allows each component to be optimized independently while maintaining overall functionality, enabling easier consumer opening without compromising production speed.
Solution Approach 2:
The material bridge is designed with non-uniform properties along its length, with varying thickness and material composition to create specific mechanical characteristics. The bridge has regions of different strength and flexibility that guide the opening process, providing localized quality variations that facilitate controlled rupture while maintaining structural integrity during production.
2Ease of operation
If conventional opening devices are used in package containers, then consumer opening is facilitated, but material usage efficiency decreases and production time increases
Solution Approach 1:
The opening device is pre-formed during the packaging material production process itself, rather than being added as a separate post-processing component. The material bridge and associated structures are created integrally with the package container through extrusion or co-forming techniques, eliminating subsequent assembly steps and reducing production time.
Solution Approach 2:
The opening device is merged with the package container structure, sharing common materials and manufacturing processes. The material bridge is formed from the same packaging material as the container body, and the entire assembly is produced in a single continuous operation, eliminating the need for separate production and assembly stages.
3Force
If the material bridge is made thin to facilitate opening, then opening force is reduced, but structural integrity during production is compromised
Solution Approach 1:
The material bridge parameters (thickness, length, material composition) are precisely controlled and varied along its length to achieve different mechanical properties in different regions. The bridge has thinner sections for easy opening and thicker sections for structural support, with parameters optimized through mathematical modeling and experimental validation to balance opening force requirements with production integrity.
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 ensures consistent and efficient opening of package containers by guiding the rupture along the weakening lines, reducing material waste and production time, thereby enhancing production efficiency and cost-effectiveness.
Implementation Method 1
The guiding section extends from the penetration area and covers at least partly the area between and adjacent to the two weakening lines to facilitate rupturing of the multilayer structure along said weakening lines
Implementation Method 2
a material bridge penetrating the penetration area and connecting the first portion to the second portion
Data Source
Figure 1~2
Figure 3~4
AI summary
Package material comprises one or more layers of plastic laminate, a first side, a second side and an penetration area (40). Two weakening lines (30, 30b) extend from the penetration area (40) creating a space in between and thus forming an opening () in the package material. The package material comprises a plastic opening device (), with a first and second portion () attached to the first and second side, respectively and a material bridge () penetrating through the penetration area (40). The second portion covers at least partly the penetration area and comprises a guiding portion () extending from the penetration area (40) onto the space adjacent and to the weakening lines (30, 30b) as to facilitate rupturing substantially along the at least one weakening line.