Peelable Resealable Package Frangible Seal Design
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Solution Overview
Problem
Existing flexible packaging solutions with zippers for food products are bulky, costly, and complex to manufacture, often failing to provide a reliable hermetic seal and can be difficult for consumers to operate.
Innovation Solution
A flexible peelable/resealable package design featuring a thermoplastic sealant substrate with a printed release lacquer coating and pressure-sensitive adhesive, utilizing a transverse fusion heat seal and score-lines to create a hermetic closure that can be easily opened and resealed without the need for complex machinery or expensive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If zippers are applied to flexible packaging, then reclosability is achieved, but the film roll becomes bulky and more difficult to handle
Solution Approach 1:
The invention extracts the reclosability function from traditional zipper mechanisms and integrates it directly into the film structure through a frangible seal layer. This eliminates the need for separate zipper components, keeping the film roll compact while providing the desired reclosing capability through a simple peel-and-stick mechanism.
Solution Approach 2:
The patent merges multiple functions into the film structure itself: the frangible seal layer provides both the sealing function and the reclosing function, while the pressure-sensitive adhesive layer enables both initial sealing and subsequent resealing. This integration eliminates the need for separate zipper components, reducing film roll bulk.
2Ease of operation
If zippers are applied to flexible packaging, then reclosability is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention replaces complex mechanical zipper systems with a chemical/adhesive-based sealing mechanism. The frangible seal layer and pressure-sensitive adhesive layer work together to provide sealing through adhesion rather than mechanical interlocking, simplifying both the packaging structure and manufacturing processes.
Solution Approach 2:
The patent utilizes changes in adhesive properties and film characteristics to enable reclosability. By controlling the frangibility of the seal layer and the tackiness of the adhesive layer, the system provides easy opening and closing without requiring complex mechanical components or sophisticated manufacturing equipment.
3Ease of manufacture
If traditional sealing methods are used, then manufacturing is simple, but hermetic seal reliability is insufficient
Solution Approach 1:
The invention employs a composite film structure with multiple functional layers: a frangible seal layer for controlled breaking, a pressure-sensitive adhesive layer for reliable bonding, and a release layer for clean separation. This composite approach maintains manufacturing simplicity while achieving superior hermetic sealing through the synergistic interaction of different material properties.
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 provides a simple, economical, and durable packaging option that is easy for consumers to use, offering a reliable hermetic seal and reducing manufacturing complexity and costs while allowing for easy opening and resealing of food products.
Implementation Method 1
a transverse fusion heat seal in the first wall panel positioned between the top end and the transverse end seal such that the transverse fusion heat seal is superimposed over an area of the release lacquer coating of the first wall panel and extends between the first side edge and the second side edge. The transverse fusion heat seal also joins a section of the sealant substrate of the first wall panel to a section of the sealant substrate of the second wall panel
Implementation Method 2
a printed release lacquer coating positioned on the abuse layer and having an area defined by a truncated length relative to the length of the sealant substrate of the first wall panel and a width extending between the first side edge and the second side edge. Printed on the release lacquer is a pressure sensitive adhesive coating positioned on the release lacquer coating and in direct contact with the sealant substrate of the first wall panel
Data Source
AI summary
The present invention is directed to flexible peelable/resealable packages having a first wall panel which includes an abuse layer forming an exterior surface of the package with a printed release lacquer coating positioned on the abuse layer and a pressure sensitive adhesive coating positioned on the release lacquer coating which may be in direct contact with the sealant substrate forming a portion of the interior surface of the package.