Hybrid Resealable Container With Cardboard Tamper-Evident Pull Tab
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Solution Overview
Problem
Conventional cardboard containers cannot be effectively resealed after initial opening, leading to exposure of contents to the environment, which affects product freshness, and lack tamper evidence features to determine if the container has been opened.
Innovation Solution
A composite container design featuring a bottom film layer, a top film layer with a resealable flap and pull tab, and a cardboard layer with a perforated pull tab, allowing for resealing without compromising the container's integrity and providing tamper evidence through the cardboard layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional cardboard containers are used, then the container structure is simple and easy to manufacture, but the container cannot be effectively resealed after initial opening, leading to loss of product freshness
Solution Approach 1:
The container combines multiple materials (cardboard, film layers, adhesive layers) to create a hybrid structure that integrates the simplicity and rigidity of cardboard with the sealability of film materials. This composite approach enables both ease of manufacture and effective resealability.
Solution Approach 2:
The container is divided into distinct functional layers: a cardboard base layer for structural integrity, a bottom film layer for sealing, a top film layer with resealable flap for closure, and adhesive layers for bonding. Each layer performs a specific function, allowing the container to be manufactured simply while achieving reliable resealability.
2Device complexity
If conventional containers without tamper evidence features are used, then the device complexity is reduced, but there is no way to determine if the container has been opened
Solution Approach 1:
The tamper-evident pull tab utilizes color changes or visual indicators to signal whether the container has been opened. When pulled, the tab displays a different color or visual state, providing clear tamper evidence without requiring complex electronic or mechanical systems.
Solution Approach 2:
The tamper-evident pull tab acts as an intermediary indicator between the container's seal status and the consumer's knowledge. It provides visual information about whether the container has been opened without requiring the consumer to inspect the actual seal or contents.
3Strength
If the top film layer is fully adhered to the bottom film layer, then the container structure is strong and intact, but the container cannot be opened and resealed
Solution Approach 1:
The adhesive bonding is applied locally rather than uniformly across the entire film layer. Specific adhesive zones are created in certain areas to maintain structural strength, while adhesive-free zones are left in other areas to allow the resealable flap to be opened and reclosed. This local differentiation of bonding properties enables both strength and resealability.
4Reliability
If the film layer is used for tamper evidence, then tamper evidence is provided, but the film layer may tear and compromise container integrity
Solution Approach 1:
The tamper-evident function is implemented using a separate pull tab structure made from a different material (cardboard or paper) rather than the thin film layer. This composite approach provides reliable tamper evidence through the more tear-resistant tab material while preserving the integrity of the film layer that seals the container contents.
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 repeated opening and resealing of the container, maintaining product freshness and providing clear visual tamper evidence without tearing issues in the film layer.
Implementation Method 1
The top film layer is partially adhered on its lower surface to the upper surface of the bottom film layer via an adhesive layer which comprises at least one resealable adhesive zone, at least one permanent adhesive zone
Implementation Method 2
The top film layer is scored to form at least one resealable flap... wherein the resealable flap is resealably adhered to the bottom film layer
Implementation Method 3
The cardboard layer is perforated to form at least one pull tab which is substantially aligned with and adhered, on its underside, to the upper surface of the top film layer pull tab
Data Source
AI summary
The present invention relates to a composite container comprising a bottom film layer and a top film layer at least partially adhered to the bottom film layer. The top film layer is scored to form at least one resealable flap and at least one pull tab which is not adhered to the bottom film layer. The bottom film layer comprises at least one cavity opening. A cardboard layer is adhered on its lower surface to the upper surface of the top film layer, wherein the cardboard layer has at least one cavity opening which is substantially aligned with the scoring of the top film layer resealable flap and the cardboard layer is perforated to define a perimeter of at least one pull tab which is substantially aligned with and adhered, on its underside, to the upper surface of the top film layer pull tab.