Flexible Packaging Structure with Built-in Reclose Feature
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Solution Overview
Problem
Existing flexible packaging solutions require separate pressure-sensitive adhesive labels for reclosability, leading to inefficiencies, waste, and additional manufacturing costs, as well as the need for external label application and shipping processes.
Innovation Solution
A flexible packaging structure with a built-in opening and reclose feature is created by forming a two-part structure with outer and inner lines of weakness, where the outer opening portion is larger and attached to the inner structure via pressure-sensitive adhesive, allowing for reclosure without external labels, and can be manufactured in-line during production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate pressure-sensitive adhesive labels are used for reclosability, then reclose functionality is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the reclose functionality directly into the packaging structure by integrating the pressure-sensitive adhesive layer between the outer and inner structures. This eliminates the need for separate labels and their associated application processes, thereby reducing manufacturing complexity while maintaining reclose functionality.
Solution Approach 2:
The packaging structure itself becomes multi-functional by incorporating the reclose feature within its own construction. The outer and inner structures with the integrated adhesive layer serve both as the packaging barrier and as the reclose mechanism, eliminating the need for separate label components.
2Adaptability or versatility
If separate pressure-sensitive adhesive labels are used, then reclosability is achieved, but waste increases
Solution Approach 1:
By merging the adhesive layer into the packaging structure itself, the invention eliminates the need for separate label materials, release liners, and die-cutting processes. This integration significantly reduces material waste while maintaining the reclose functionality.
3Adaptability or versatility
If separate labels are applied, then reclosability is achieved, but manufacturing time and shipping costs increase
Solution Approach 1:
The adhesive layer is applied to the inner structure during the initial packaging manufacturing process, before the package reaches the consumer. This preliminary integration of the reclose feature eliminates the need for subsequent label application steps and reduces overall manufacturing time and shipping costs.
Solution Approach 2:
The invention combines the reclose feature application with the main packaging manufacturing process, eliminating separate label application steps. This integration streamlines production and reduces the time and resources required for manufacturing and shipping.
4Ease of operation
If pressure-sensitive adhesive is applied to outer structure, then reclosure is enabled, but manufacturing precision requirements increase
Solution Approach 1:
The pressure-sensitive adhesive is applied locally to specific regions of the inner structure where it is needed for reclosure, rather than covering the entire surface. This localized application reduces the precision requirements for adhesive placement while maintaining effective reclose functionality.
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 solution eliminates the need for separate labels, reduces waste and shipping costs, and enables efficient in-line manufacturing of reclosable packaging, maintaining product freshness and integrity by allowing for easy opening and resealing without external labels.
Implementation Method 1
A pressure-sensitive adhesive is applied to either the marginal region of the outer opening portion or the underlying portion of the inner structure
Data Source
AI summary
A flexible packaging laminate is formed to have a built-in opening and reclose feature by forming the laminate as a two-part structure having an outer structure joined in face-to-face relation with an inner structure. Score lines are formed in both structures to enable an opening to be formed through the laminate by lifting an opening portion (e.g., a flap or the like) of the two structures out of the plane of the laminate. The score line through the outer structure defines a larger opening than the score line through the inner structure, such that a marginal region of the outer structure extends beyond the edge of the opening portion of the inner structure. A pressure-sensitive adhesive is used to re-adhere the marginal region to an underlying surface of the inner structure adjacent the opening through the laminate.