Piercing Opening Pocket Structure for Leak-Safe Drink Pouches
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Beverage containers with puncture openings for drinking straws often experience liquid leakage due to pressure, and there is a risk of the container being pierced on the opposite side, while also needing to be environmentally friendly.
Innovation Solution
A beverage container with a puncture opening that includes a sealing film welded around the puncture site, forming a pocket between the inner and outer weld edges, allowing for controlled insertion and piercing of the straw without leaking, using a thinner or differently structured sealing film that can be pierced more easily than the container material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pressure is applied to puncture the beverage container, then the drinking straw can be inserted, but liquid leaks out and the opposite side may be pierced
Solution Approach 1:
A pocket is formed in the beverage container wall at the puncture location, creating a recessed area that guides the drinking straw insertion. This preliminary structural preparation ensures the straw follows the correct path through the container wall, preventing it from piercing through to the opposite side while still allowing effective puncture and insertion
2Strength
If a thick sealing film is used to prevent piercing through, then the opposite side is protected, but the puncture becomes more difficult and may cause leakage
Solution Approach 1:
The sealing film is designed with different properties at different locations: it has sufficient thickness and strength in areas away from the puncture opening to prevent piercing through to the opposite side, while the pocket structure at the puncture location provides a controlled path that reduces the effective resistance during insertion, allowing easy puncture without compromising overall strength
3Reliability
If additional sealing materials are applied from the outside, then sealing is improved, but environmental friendliness and simplicity are reduced
Solution Approach 1:
The pocket structure is formed as an integral part of the beverage container wall itself, using the existing material rather than requiring additional sealing layers or external materials. This self-service approach provides effective sealing and guidance functionality while maintaining environmental friendliness and structural simplicity
Data Source
Figure 1~3b
AI summary
Beverage container (1), in particular beverage pouch, which is provided with a piercing opening (2) for piercing with a drinking straw (5), in which beverage container (1) the piercing opening (2) is stamped and, on the inside, an outwardly exposed closure foil is fastened to the inner side around the piercing opening (2) by means of a welded joint (7), with the result that a sealed closure is produced, characterized in that a pocket (6) is formed between the inner welded edge (3) of the welded joint (7) and the lower edge (2b) of the piercing opening (2), in which pocket (6) the material of the beverage container (1) and the closure foil are not connected to one another.