Straw Insertion Opening for Multilayer Beverage Packaging
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Solution Overview
Problem
Existing beverage packaging solutions, such as those disclosed in EP 0 600 502 A1, face issues with damage visibility, increased production costs, insufficient protection against oxygen migration and leakage, and potential detachment of sealing materials, which compromise the integrity and originality of the packaging.
Innovation Solution
The packaging material remains intact until the drinking straw pierces it, with the outer layer(s) being removed at the puncture point using a laser, creating a visible marking and ensuring the inner layer(s) remain intact for sealing, thus preventing oxygen ingress and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the packaging film is punched open before filling to create a drinking straw hole, then the straw can be inserted easily, but the packaging material is damaged and oxygen can penetrate into the beverage container
Solution Approach 1:
The outer layer is pre-cut in a cross-shaped pattern at the intended puncture location, but the actual penetration is delayed until straw insertion. This preliminary preparation creates a guided path that reduces insertion force while maintaining packaging integrity until use.
Solution Approach 2:
The packaging film is divided into multiple layers with different functions: the outer layer provides structural integrity and is partially removed, while the inner layer remains intact for sealing. This segmentation allows the packaging to maintain its protective function while enabling easy straw insertion.
2Reliability
If a PE strip is glued under the punched straw hole to seal the opening, then leakage is prevented, but production complexity and costs increase
Solution Approach 1:
The problematic PE strip sealing element is completely removed from the design. Instead, the inner layer of the packaging film itself is used to provide the sealing function, eliminating the need for additional sealing components and simplifying the production process.
Solution Approach 2:
The sealing function previously performed by a separate PE strip is merged into the inner layer of the packaging film. This integration eliminates the need for additional sealing components and reduces production complexity while maintaining effective leakage prevention.
3Ease of operation
If the outer layer is completely removed at the puncture point, then the drinking straw can pierce easily, but the packaging material thickness is reduced
Solution Approach 1:
The outer layer is removed only locally at the puncture point in a cross-shaped pattern, while the rest of the packaging film maintains its full thickness and structural strength. This localized modification enables easy straw insertion without compromising the overall packaging integrity.
4Reliability
If the packaging material remains intact until use, then oxygen migration is prevented, but the drinking straw insertion requires more force
Solution Approach 1:
The outer layer is pre-cut in a cross-shaped pattern at the intended puncture location, but the actual penetration is delayed until straw insertion. This preliminary preparation creates a guided path that reduces insertion force while maintaining packaging integrity until use.
Solution Approach 2:
The outer layer is removed only locally at the puncture point in a cross-shaped pattern, while the rest of the packaging film maintains its full thickness and structural strength. This localized modification enables easy straw insertion without compromising the overall packaging 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
This approach maintains packaging integrity, ensures easy straw insertion, and prevents leakage or spoilage by creating a secure seal between the straw and packaging, while reducing production complexity and costs.
Implementation Method 1
the outer layer (and optionally one or more middle layer(s)) of the packaging material (packaging film) is completely removed in the area of the puncture point using a laser
Data Source
Figure 1~2
AI summary
The container (1) has a drinking straw injecting portion (3) that is formed in the front end to pierce multilayer composite packaging material (2). A drinking straw is provided in injecting portion, and is introduced into container main portion. The outer layer (7), middle layer (8), and an inner layer (9) are formed in the packaging material. The thickness of the outer layer of the composite material in the region (10) of the injecting portion is reduced, so as to facilitate piercing of the composite material. The middle layer is formed with aluminum foil. The polyethylene terephthalate film is formed with thickness of 9-15 mu m. The middle aluminum foil is formed with thickness of 6-12 mu m. The inner polyethylene film is formed with thickness of 60-100 mu m.