Composite Container Adhesive Connection for Controlled Dispensing
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Solution Overview
Problem
Existing composite containers face challenges in manufacturing ease and controlled dispensing, as the connection between the inner and outer containers is not easily adaptable, leading to inefficient product release and potential product trapping during use.
Innovation Solution
A composite container design featuring an adhesive connection between the inner and outer containers, formed through injection molding and blow molding, where the adhesive strip ensures uniform adherence and controlled detachment under pressure, allowing for uniform dispensing without product contact with the displacing medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner container is connected to the outer container through integral formation with two-component injection moulding and blow moulding, then the connection is gradual and the container structure is unified, but the manufacturing process becomes complex and the release behaviour cannot be easily controlled
Solution Approach 1:
The connection between inner and outer containers is segmented into discrete adhesive application zones rather than a continuous integral connection. The adhesive strip is applied only at specific locations (e.g., halfway between dispensing opening and bottom, or at multiple discrete points) to create controlled detachment zones that allow manageable separation during dispensing.
Solution Approach 2:
An adhesive strip serves as an intermediary element between the inner and outer containers, replacing the complex integral moulding process. This adhesive layer can be selectively applied and removed, providing controlled connection and release behaviour without requiring complex multi-component moulding operations.
2Reliability
If the adhesive connection is made strong and extensive, then the connection stability is improved, but the controlled detachment and uniform dispensing are compromised
Solution Approach 1:
The adhesive connection is applied with varying local properties - stronger adhesive at certain zones and weaker or no adhesive at others. For example, adhesive may be applied halfway between the dispensing opening and bottom, or at multiple discrete peripheral points, creating localized connection zones that maintain stability while allowing controlled detachment at specific locations during dispensing.
Solution Approach 2:
The adhesive connection transitions from a static strong bond to a dynamic controlled detachment system. The adhesive strip is positioned and sized to detach at specific moments during the dispensing process, allowing the inner container to separate gradually and uniformly as displacing medium is introduced, rather than all at once or not at all.
3Productivity
If the inner container is gradually compressed during dispensing, then the product can be pressed out, but product trapping may occur and uniform dispensing is difficult to achieve
Solution Approach 1:
The adhesive connection is segmented into multiple discrete zones around the periphery rather than a continuous bond. This segmentation allows different regions of the inner container to detach at different rates and positions, enabling uniform compression and product flow while preventing trapping at any single location.
Solution Approach 2:
The adhesive strip is pre-positioned at specific locations (e.g., halfway between dispensing opening and bottom, or at peripheral points) before the dispensing process begins. This preliminary placement ensures that as compression occurs, the adhesive detaches in a controlled sequence that promotes uniform product flow and prevents trapping.
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 simplifies manufacturing and enhances controlled dispensing, preventing product trapping and ensuring uniform release, making the composite container suitable for applications with food products by maintaining a secure connection under pressure.
Implementation Method 1
the inner container (3) is further connected to the outer container (2) by an adhesive connection (8) over at least a part of its periphery
Implementation Method 2
a displacing medium such as air is forced between the two containers. The flexible inner container is here gradually compressed further, whereby the content thereof, generally a liquid or a pasty mass, is pressed out of the composite container through the dispensing opening
Data Source
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AI summary
The invention relates to a composite container (1), comprising a form-retaining outer container (2) and a flexible inner container (3) received therein, which inner container comprises a dispensing opening (4) which is mounted in a neck (5) of the outer container, wherein the inner container is further connected by an adhesive or weld connection (8) over (a part of) its periphery to the outer container. The adhesive or weld connection can take the form of an adhesive strip or a weld extending transversely of, parallel to or at a non-right angle to a longitudinal axis (L) running from the dispensing opening to an opposite bottom (9) of the container. The adhesive or weld connection can be adapted to detach in controlled manner under the influence of pressures occurring in the container. The invention further relates to a method for manufacturing a composite container, wherein the inner container is connected over (a part of) its periphery thereto by means of adhesion or welding.