Multilayer Reclosable Sticker for Hinge-Lid Container Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing process of containers with self-adhesive reclosable stickers is inflexible, and existing solutions struggle to ensure effective sealing and preservation of freshness for consumer goods, particularly for elongate items like smoking articles, due to the need for even surfaces and high adhesive strength.
Innovation Solution
A hinge lid container design featuring a multi-layer self-adhesive reclosable sticker with a first layer affixed to the package and a second layer that can be easily peeled off, allowing for repeated opening and closing without damaging the package, and extending beyond the access opening for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-adhesive reclosable sticker is applied onto the inner package, then the access opening can be sealed and resealed, but the manufacturing process becomes inflexible because the sticker must be applied before the package is formed
Solution Approach 1:
The sticker is divided into multiple layers: a first layer that is permanently affixed to the package, and a second layer that is removably affixed to the first layer. This segmentation allows the sticker to be applied after package formation while maintaining sealing capability and enabling repeated opening/closing operations.
Solution Approach 2:
The first layer of the sticker is pre-applied to the inner package surface before the package is formed into its final shape. This preliminary action ensures proper adhesion and positioning, while the second layer is added later to provide the reclosable functionality, thus resolving the conflict between sealing reliability and manufacturing flexibility.
2Reliability
If the adhesive label extends beyond the periphery of the access opening to ensure proper sealing, then shelf-life is improved, but the adhesive must be very strong which makes repeated opening and closing difficult
Solution Approach 1:
The sticker is segmented into a first layer with strong adhesive for sealing reliability, and a second layer with removable adhesive for ease of operation. The second layer can be easily peeled off and reattached, allowing repeated opening and closing while the first layer maintains secure attachment to the package and ensures proper sealing when closed.
Solution Approach 2:
Different adhesive properties are applied to different layers of the sticker. The first layer uses strong adhesive for secure attachment and sealing effectiveness, while the second layer uses removable adhesive for easy opening and closing operations. This local differentiation of adhesive quality resolves the contradiction between sealing strength and operational ease.
3Manufacturing precision
If the sticker is applied onto an even surface before wrapping, then adhesion is maximized, but the manufacturing process loses flexibility for different package designs
Solution Approach 1:
The first layer of the sticker is applied to the inner package surface in its blank, unwrapped state where the surface is even and flat. This preliminary application ensures optimal adhesive bonding quality. After the sticker is secured, the package is then formed and wrapped around the consumer articles, allowing the manufacturing process to maintain both high adhesion quality and flexibility for different package designs.
Solution Approach 2:
The two-layer sticker structure allows the first layer to be applied early on the even surface for maximum adhesion, while the second layer is added later to provide the reclosable function. This segmentation enables the manufacturing process to achieve both high bonding quality and adaptability to various package configurations.
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 design simplifies the manufacturing process, ensures consistent opening force regardless of package materials, and maintains product freshness by allowing easy and secure resealing of the access opening.
Implementation Method 1
a first adhesive provided on an inner surface of the first layer extending about at least a sealing portion of an outer surface of the package located at a periphery of the access opening
Implementation Method 2
a second adhesive provided on a first area of an inner surface of the second layer extending about at least the lower periphery of the cut-out of the first layer
Data Source
AI summary
A hinge-lid container comprises a resealable package of consumer goods, the package having an opening through which consumer goods can be removed; and a self-adhesive reclosable sticker covering the opening of the package and extending beyond the periphery of the opening of the package. The sticker comprises a first and a second layer of labelling web material. The first layer is affixed to the package by a first adhesive provided on the inner surface of the first layer extending about at least a sealing portion of the package at the periphery of the opening. The first layer comprises a cut-out aligned with the opening of the package. The second layer is at least partially releasably affixed to the first layer by a second adhesive provided on a first area of the inner surface of the second layer extending about at least the lower periphery of the cut-out of the first layer. The second adhesive is a removable adhesive and a peel strength for peeling the first layer from the package is greater than a peel strength for peeling the second layer from the first layer. The second layer of the self-adhesive reclosable sticker is permanently affixed to the inner surface of the lid.