Flexible Packaging Structure with Built-In Tamper Evidence
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Solution Overview
Problem
Existing flexible packaging solutions face inefficiencies with separate pressure-sensitive adhesive labels, leading to waste, additional costs, and inadequate tamper-evidence features that are difficult to discern and can create choking hazards.
Innovation Solution
A flexible packaging structure with built-in opening and reclose features, incorporating score lines and tear portions with a tab, and a pressure-sensitive adhesive that ensures the tamper-evidence is visually apparent and avoids the need for separate labels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate pressure-sensitive adhesive labels are used for reclosing flexible packaging, then reclose capability is achieved, but manufacturing cost increases and waste is generated
Solution Approach 1:
The patent merges the reclose function directly into the packaging film by integrating a pressure-sensitive adhesive layer within the film structure itself, eliminating the need for separate external labels. This consolidation achieves reclose capability while reducing manufacturing complexity and cost by removing additional components and application steps.
Solution Approach 2:
The packaging film is designed to perform multiple functions simultaneously: it provides structural containment, incorporates tamper-evidence features through score lines, and includes built-in reclose capability through the integrated pressure-sensitive adhesive layer. This multi-functionality eliminates the need for separate specialized components.
2Adaptability or versatility
If separate pressure-sensitive adhesive labels are used for reclosing flexible packaging, then reclose capability is achieved, but manufacturing efficiency decreases due to additional shipping and conversion steps
Solution Approach 1:
The patent combines the reclose function directly into the packaging film by integrating a pressure-sensitive adhesive layer within the film structure itself, eliminating the need for separate external labels. This consolidation achieves reclose capability while reducing manufacturing complexity and cost by removing additional components and application steps.
Solution Approach 2:
The pressure-sensitive adhesive layer is pre-integrated into the film structure during film manufacturing, so that when the film is converted into packaging, the reclose functionality is already in place. This preliminary integration eliminates the need for subsequent label application steps at the conversion facility.
3Reliability
If traditional tamper-evidence features are used, then tamper detection capability is provided, but the features are difficult to discern visually and may create choking hazards
Solution Approach 1:
The patent incorporates color-changing or visually distinct features into the tamper-evidence design, such as colored ink patterns or contrasting color zones that become visibly altered when the package is opened. This enhances visual detectability of tampering while maintaining reliability of the tamper detection function.
Solution Approach 2:
The tamper-evidence feature is designed as a distinct segmented element (such as a separate tamper-evident layer or patterned region) that can be visually identified as different from the rest of the packaging. This segmentation makes the tamper detection feature more easily discernible while maintaining its functional integrity.
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 efficient, cost-effective packaging with integrated tamper-evidence and reclose capabilities, reducing waste and manufacturing costs while ensuring the package's integrity is visibly evident upon opening.
Implementation Method 1
the flap can be reattached to the remainder of the film to close the opening
Data Source
AI summary
A flexible packaging laminate has built-in opening/reclose and tamper-evidence features by forming the laminate from an outer structure joined in face-to-face relation to an inner structure. Score lines are formed in both structures to enable an opening to be formed through the laminate by lifting a flap or the like 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. The outer score line includes at least one tear portion that is torn through upon initial opening, thus indicating the package has been at least partially opened.