Resealable Container Label with Release Agent Peel Control
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Solution Overview
Problem
Existing resealable containers for consumer goods, particularly smoking articles, fail to maintain a predetermined moisture content under extreme weather conditions and require an inconveniently high opening force, especially when first opened, which decreases with repeated use.
Innovation Solution
A resealable container design featuring a reclosable adhesive label with a bottom and top layer of labelling material, where the bottom layer is affixed with a permanent adhesive and the top layer is partly releasably attached using a second adhesive, incorporating a release agent to control the peel force, ensuring easy opening and effective moisture retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a low-strength, resealable adhesive is used to affix the cover flap to the inner package, then the container can be opened and closed repeatedly, but the sealing efficiency decreases after repeated use, especially under extreme climates
Solution Approach 1:
The label is divided into two distinct layers: a bottom layer that provides structural support and moisture barrier functionality, and a top layer that serves as a reusable seal. This segmentation allows each layer to specialize in different functions, with the top layer being optimised for repeated sealing operations while the bottom layer maintains the moisture barrier integrity.
Solution Approach 2:
The invention uses a composite label structure combining two different labelling materials with distinct properties. The bottom layer and top layer are made of different materials with different adhesive characteristics, allowing the composite structure to achieve both strong initial sealing and maintained sealing efficiency after repeated use.
2Reliability
If a permanent adhesive is used to affix the label to the package, then the moisture barrier properties are improved, but the opening force becomes excessively high, especially when first opened
Solution Approach 1:
The adhesive system is segmented into two parts: a permanent adhesive on the bottom layer that provides strong moisture barrier properties, and a releasable adhesive on the top layer that allows easy opening. This segmentation enables the permanent adhesive to protect the package without creating excessive opening force.
Solution Approach 2:
Different adhesive properties are applied to different parts of the label system. The bottom layer uses permanent adhesive for strong, lasting attachment and moisture protection, while the top layer uses releasable adhesive for easy opening. This local differentiation of adhesive quality resolves the contradiction between strong sealing and easy opening.
3Reliability
If the reclosable adhesive label is designed with strong adhesion to maintain sealing efficiency, then moisture retention is improved, but the peel force increases making opening difficult
Solution Approach 1:
The label is segmented into two layers with different adhesive characteristics. The bottom layer has strong permanent adhesion for sealing efficiency, while the top layer has controlled releasable adhesion for manageable peel force. This segmentation allows the system to achieve both strong sealing and easy opening.
Solution Approach 2:
Different adhesive strengths are applied locally to different layers of the label. The bottom layer uses strong permanent adhesive where sealing efficiency is critical, while the top layer uses weaker releasable adhesive where easy opening is needed. This local quality differentiation resolves the contradiction between sealing strength and opening ease.
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 container maintains a consistent moisture content and provides an easy opening experience by finely tuning the peel force, ensuring the freshness of consumer goods and extending shelf life, even in tropical climates.
Implementation Method 1
incorporating a release agent to control the peel force
Implementation Method 2
the bottom layer is affixed with a permanent adhesive
Implementation Method 3
The reclosable adhesive label occludes the access opening of the package... ensuring effective moisture retention
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A package (18) of consumer goods has an opening for removing the goods and a reclosable adhesive label (22) occluding the opening. The label (22) comprises a bottom layer (24) and atop layer(26). The bottom layer (24) is affixed to the package (18) by means of permanent adhesive provided on a first area (30) of the inner surface of the bottom layer extending about the periphery of the opening, the bottom layer comprising a cut-out portion (28) at least partly aligned with the opening of the package. The top layer (26) is at least partly affixed to the bottom layer (24) by permanent adhesive provided on a back hinge area (32) of the inner surface of the top layer, and at least partly releasably affixed to the bottom layer by means of a second adhesive provided on a peeling area (34) of the inner surface of the top layer extending distal from the hinge area (32). Thus, the top layer (26) is movable from a closed position, wherein it overlies at least the access opening, and an open position, wherein it is lifted off the bottom layer (24) to reveal the cut-out portion (28). The second adhesive is a permanent or semi- permanent adhesive and a layer of a release agent is provided between the bottom layer (24) and the top layer (26). In the closed position, a front end portion of the peeling area (34) of the inner surface of the top layer (26) at least partially overlies the release agent.