Composite Packaging Foil with Perforated Weakening Zones
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Solution Overview
Problem
Current packaging solutions struggle to provide childproof and senior-friendly features while maintaining the barrier function, as easy opening mechanisms can compromise safety and difficult openings may hinder usability for elderly users.
Innovation Solution
A composite packaging foil with a high tear-resistance first layer and a sealable second layer, featuring a low-density perforation zone that reduces tear-resistance only in specific areas, allowing easy opening while maintaining overall integrity, combined with a method using a roller arrangement with protrusions to create elongated perforations for defined tearing directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the packaging foil is made with high tear-resistance material to ensure childproof properties, then child safety is improved, but ease of opening for adults deteriorates
Solution Approach 1:
The packaging foil is divided into different zones with distinct properties: a first zone with high tear resistance for child safety, and a second weakening zone with reduced tear resistance for easy adult opening. This segmentation allows each zone to fulfill its specific function without compromising the other.
Solution Approach 2:
The packaging foil exhibits spatially varying properties: the first zone maintains high tear resistance throughout, while the second zone specifically reduces tear resistance only in the weakening area. This local quality modification enables differentiated functionality within a single packaging structure.
2Ease of operation
If perforations are added to enable easy opening, then ease of opening for adults is improved, but childproof properties deteriorate
Solution Approach 1:
Perforations are segregated to only the second weakening zone, while the first zone remains intact without perforations. This spatial segmentation ensures that opening aids are provided only where needed for adult users, without compromising the childproof integrity of the first zone.
Solution Approach 2:
The perforation structure is applied locally only in the second zone to reduce tear resistance where opening is intended, while the first zone maintains its full barrier and tear resistance properties. This localized modification preserves child safety while enabling easy opening.
3Ease of operation
If the entire packaging foil is made easy to open, then senior friendliness is improved, but childproof properties deteriorate
Solution Approach 1:
The packaging foil is segmented into a first zone that maintains high tear resistance for child safety and a second zone with reduced tear resistance that provides opening assistance for seniors. This segmentation enables differentiated accessibility without compromising safety.
Solution Approach 2:
The tear resistance is modified locally in the second zone to accommodate seniors with reduced hand strength, while the first zone maintains its original high tear resistance to prevent children from opening the packaging. This local quality adjustment addresses senior needs without compromising child safety.
4Ease of operation
If weakening zones with perforations are introduced, then ease of opening is improved, but overall structural integrity deteriorates
Solution Approach 1:
The packaging foil is divided into a first zone that maintains full structural integrity and a second zone with controlled weakening. This segmentation ensures that the overall packaging structure remains intact and protective, while only the designated opening area is weakened for easy opening.
Solution Approach 2:
The structural properties are modified locally only in the second weakening zone where perforations reduce tear resistance, while the first zone maintains its full structural integrity. This localized modification allows easy opening without compromising the overall strength and protective function of the packaging.
Data Source
Figure 1~3
Figure 4a~5d
Figure 6a~6h
AI summary
A composite packaging foil (4) for a childproof and/or senior friendly packaging (5), comprising a first layer (1) having a first outer surface (11) and a first inner surface (10), wherein the first layer (1) imparts tear-inhibiting properties to the packaging foil (4), a second layer (12) having a second outer surface (21) and a second inner surface (20), wherein the second outer surface (21) of the second layer (2) is sealable against a mating surface, an inner layer (3) arranged between the first inner surface (10) of the first layer (1) and the second inner surface (20) of the second layer (2). The packaging foil (4) has at least one weakening zone (6) in which the tear-inhibiting properties of the packaging foil (4) are reduced by a plurality of perforations (7) that are present in the first layer (1). The density of perforations (7) in the weakening zone (6) lies between 50 and 250, preferably between 50 and 150 and particularly preferred between 70 and 130 perforations per cm2.