Flexible Film Package Opening Feature With Pull Tab
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Solution Overview
Problem
Flexible film packaging often presents difficulties for consumers in opening and accessing contents due to unreliable tear initiation features and lack of resealability, with existing solutions being non-intuitive or requiring accurate registration during package formation.
Innovation Solution
A flexible film laminate with a package opening feature that includes a pull tab and opposing gripping tab, formed with throughcuts and partial-depth cuts, allowing easy manual grasping and opening without rupturing the end seal, and featuring a resealable adhesive for reclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tear initiation features are incorporated into the film to enable opening, then package opening becomes easier, but the tear propagation becomes unreliable and requires accurate registration during package formation
Solution Approach 1:
The film is segmented into different functional zones: a sealed end portion, an unsealed leading portion, and a transverse cut that creates a tab. This segmentation allows the tab to be pulled to initiate tearing at a specific location while the sealed portion maintains structural integrity and provides reliable tear propagation without requiring precise registration during formation.
Solution Approach 2:
The transverse cut and tab structure are pre-formed during package fabrication, creating a ready-to-open configuration. The tab is preliminarily positioned and secured by the sealed end portion, so that when the consumer pulls the tab, the tearing action is immediately initiated at the predetermined location without requiring any additional setup or registration steps.
2Ease of operation
If consumers grasp and pull package walls to open, then opening can be achieved, but the package seal is ruptured and the package is not resealable
Solution Approach 1:
The opening function is extracted from the main package body by creating a separate tab structure on the end seal. The tab can be pulled to open the package without requiring the consumer to grasp and pull the entire package walls, thereby preventing damage to the main sealed portions and enabling resealability of the end seals after opening.
Solution Approach 2:
The end seal has different properties in different regions: the transverse cut creates a localized opening area where the film is separated to form tabs, while the rest of the end seal maintains its sealed, resealable quality. This local differentiation allows opening at one location without compromising the integrity and resealability of other portions of the package.
3Ease of repair
If adhesive-free or adhesive-deadened tabs are placed on the package face for opening, then resealability is maintained, but consumers do not quickly recognize the grasping portions
Solution Approach 1:
The tab area can be differentiated from the rest of the package through visual cues such as color changes, printing, or contrasting patterns on the film surface. This makes the adhesive-free tab region easily recognizable to consumers, indicating where to grasp and pull for opening, while the rest of the package maintains its adhesive properties for resealability.
Solution Approach 2:
The tab structure creates an asymmetric feature on the otherwise symmetric package end seal. The pulled-apart portions of the film forming the tabs create an obvious visual and tactile asymmetry that draws consumer attention to the opening location, making it easily recognizable without compromising the resealable adhesive properties of the surrounding areas.
Data Source
Figure 1~1A
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Figure 5~6
AI summary
Flexible film packages having an easily opened package feature incorporated therein and method of producing such packages are provided. The package opening feature may be incorporated into a variety of package formats such as flow wrapped packages having a longitudinal seal (including fin seals or lap seals) or packages with side seals (including two-, three-, or four-side seal pouches). In one illustrative approach, the package opening feature is disposed adjacent or at a package seal, such as, for example, an end seal, a top seal, a bottom seal, a side seal, or a longitudinal seal. The flexible film laminate has at least first and second film layers, and at least one of the film layers defining an interior cavity configured to hold food products. In a number of configurations, the flexible film packages may be reclosable or resealable.