Dual-Function Adhesive Tape for Container Closure and Opening
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Solution Overview
Problem
Automated containers with on-demand production face challenges in easy opening and closure methods, as existing glue-based closures are difficult to apply and hard to open, causing structural damage when removed.
Innovation Solution
A dual-function closure system using a single adhesive tape with a carrier substrate and two activatable adhesive compositions, applied between container panels and flaps, allowing for secure sealing and easy opening by pulling the tape, without causing substantial structural damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glue-based closure is used to seal the container, then the sealing strength is improved, but the ease of opening deteriorates and structural damage occurs when removed
Solution Approach 1:
The adhesive system is segmented into two distinct components: a pressure-sensitive adhesive on the carrier substrate for initial bonding, and a separate activatable adhesive composition applied to the container surface that undergoes chemical or physical activation to enhance bond strength. This segmentation allows the tape to be applied easily with pressure-sensitive adhesive while the activated adhesive provides strong sealing that can be opened without damage.
Solution Approach 2:
The adhesive properties are changed through activation parameters such as heat, moisture, or chemical reaction. The activatable adhesive composition remains in a non-active state during application, allowing easy positioning, then undergoes parameter change (activation) to achieve strong sealing bonds that prevent structural damage upon opening.
2Productivity
If automated container production is implemented, then productivity is improved, but the complexity of closure application increases
Solution Approach 1:
The pressure-sensitive adhesive is pre-applied to the carrier substrate in a controlled state during tape manufacturing. During automated container production, the tape is simply positioned and pressed onto the container, with the activatable adhesive composition being activated after positioning. This preliminary preparation simplifies the automated application process while maintaining sealing effectiveness.
Solution Approach 2:
The carrier substrate acts as an intermediary that carries both adhesive compositions and facilitates their controlled application. The pressure-sensitive adhesive on the carrier substrate enables easy positioning and initial bonding, while the activatable adhesive composition on the container surface provides the final strong seal, simplifying the overall automated application process.
3Reliability
If strong adhesive bonding is used to secure the container, then reliability is improved, but the ease of repair and opening deteriorates
Solution Approach 1:
The adhesive system transitions from a static pressure-sensitive state during application to a dynamic activated state during sealing. The activatable adhesive composition can be activated or deactivated based on conditions, allowing the closure to be securely bonded during transport while enabling easy opening when needed by reversing or reducing the activation effect.
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
Enables secure sealing and easy opening of containers in a single automated operation, with the tape retaining its structure upon removal and maintaining sufficient adhesive strength to prevent damage, suitable for paper board and other materials.
Implementation Method 1
a first activatable adhesive composition disposed on the carrier substrate first surface and a second activatable adhesive composition disposed on the carrier substrate second surface
Data Source
AI summary
Methods, articles, and apparatus that provide a dual function closure/opening system that utilizes a tape serving as both a sealing closure and as an opening mechanism. For example, in one embodiment, a single adhesive tape is introduced between a container flap and a container panel and then the container flap and the container panel are pressed together forming a bond between the flap and the panel via the adhesive tape thereby closing the container. In another embodiment, one end of a container includes two overlapping flaps and a single adhesive tape is introduced between the overlap of the two container flaps and then the container flaps are pressed together forming a bond between the flaps via the adhesive tape thereby closing the container. The methods and apparatus disclosed herein are directed to any container with at least one flap that overlaps a side panel of the container or that overlaps another flap.