Pouch Straw Channel Design for Spillage Prevention
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Solution Overview
Problem
Existing drinks pouches with attached straws often result in spillages during straw insertion due to difficulty in piercing the polyethylene strip without squeezing the pouch, and the manufacturing process is complex and costly, with risks of contamination from adhesives or additional materials.
Innovation Solution
A drinks pouch design featuring a sealed internal straw that extends outwards upon opening, guided by a heat-sealed channel created within the pouch using a triplex laminate material, with a tearable corner and overpressure to facilitate easy access and minimize spillage, utilizing a heat seal machine for mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a straw is attached to the outside of the pouch and piercing is required for use, then the pouch structure remains simple, but spillages occur during straw insertion due to difficulty in piercing the polyethylene strip without squeezing the pouch
Solution Approach 1:
The straw is pre-inserted through the polyethylene strip during manufacturing, and the piercing action is performed in advance rather than at the point of use. This eliminates the difficulty of piercing during operation and prevents spillage that occurs when users attempt to pierce the pouch themselves.
Solution Approach 2:
A channel is introduced as an intermediary structure that guides the straw through the pouch wall. This channel facilitates the straw's movement and positioning, making insertion easier and more reliable while preventing uncontrolled liquid flow that causes spillage.
2Ease of operation
If raised portions or additional materials are added to create the straw restraining passage, then the straw can be retained internally, but material costs and manufacturing complexity increase
Solution Approach 1:
The straw restraining passage is merged with the existing pouch wall structure rather than being added as a separate component. The passage is formed by shaping the pouch wall itself, eliminating the need for additional materials like adhesive or silicone and reducing manufacturing steps.
Solution Approach 2:
The pouch wall material serves multiple functions: it provides the structural enclosure, forms the straw restraining passage through its shape, and guides the straw during insertion. This multi-functionality eliminates the need for separate restraining components and reduces overall complexity.
3Ease of operation
If adhesive or silicone is used to create the straw restraining passage, then the straw can be retained, but the risk of contamination of the pouch contents increases
Solution Approach 1:
The pouch is designed as a single-use container where the straw restraining passage is formed by the disposable pouch structure itself. This eliminates the need for reusable adhesive or silicone components that could contaminate the drink, as the entire pouch including the passage is discarded after use.
Solution Approach 2:
The physical parameters of the pouch wall (shape, thickness, or structural configuration) are changed to create the restraining passage, rather than using chemical substances like adhesive or silicone. This parameter change approach maintains food safety by avoiding potential contaminants while achieving the same functional result.
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 effectively reduces spillage during straw insertion and simplifies the manufacturing process, ensuring the straw is easily accessible while maintaining pouch integrity and reducing material costs, with the channel acting as a funnel for remaining liquid.
Implementation Method 1
one or more heat seal formed between parts of the pliant packaging material to define a channel in which at least part of the straw is located
Implementation Method 2
the pouch is sealed with a gas pressure in the sealed pouch which is slightly higher than normal atmospheric pressure and upon opening the pouch, equalisation of the pressure with the surrounding atmosphere urges the straw up through the channel so that it extends outwards from the opening in the pouch
Data Source
Figure 1A~1C
Figure 2~3
Figure 4A~4B
AI summary
A drinks pouch comprising an internal cavity suitable for containing a drink, the cavity being defined by one or more wall which encloses the cavity. At least part of the wall is constructed from a heat bondable pliant packaging material such as a laminate which is shaped and sealed to form a pouch. A drinking straw is sealed within the cavity in a channel which is formed by heat bonding together parts of the pliant packaging. An openable section for opening the drinks pouch is located near the channel, which when opened creates a hole which allows access to the drink in the cavity. The channel is positioned to guide the straw through the hole when the pouch has been opened.