Reclosable Cigarette Pack Flap with Segmented Adhesive
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Solution Overview
Problem
Current easy opening and reclose systems for cigarette packs often result in adhesive contamination and potential sticking of smoking articles, with existing solutions having specific drawbacks that necessitate improvement for user convenience and product integrity.
Innovation Solution
A reclosable pack design featuring a flexible packaging laminate with specifically positioned score lines creating a flap with a permanently tacky adhesive on its periphery, which remains on the underlying surface after peeling, providing easy access and resealing without contaminating the user's fingers or the smoking articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanently tacky adhesive is applied to the opening access to enable reclosing, then the reclosing function is improved, but adhesive contamination of fingers and smoking articles occurs
Solution Approach 1:
The opening access is divided into two distinct surfaces: an inner surface with permanently tacky adhesive for reclosing, and an outer surface without adhesive for user interaction. This segmentation allows the adhesive to function while preventing contamination of fingers and smoking articles.
Solution Approach 2:
The adhesive property is localized only to the inner surface of the opening access, while the outer surface remains adhesive-free. This local application of tackiness enables reclosing functionality without causing contamination during the opening operation.
2Ease of operation
If the opening access extends over the top-end wall and front wall, then ease of opening is improved, but adhesive exposure and contamination risk increase
Solution Approach 1:
The opening access is segmented into an inner adhesive-bearing surface and an outer adhesive-free surface. Users interact with the outer surface during opening, which extends over the top-end wall and front wall for ease of access, while the inner surface remains protected for reclosing functionality.
3Ease of operation
If a flap structure is created with score lines, then controlled opening is improved, but manufacturing complexity increases
Solution Approach 1:
Score lines are pre-formed on the laminate during manufacturing to define the flap structure. These pre-formed guides enable users to create a controlled opening by peeling along the score lines, while the permanently tacky adhesive is simultaneously applied to the inner surface to ensure proper reclosing function.
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 ensures easy and hygienic opening and reclosing of cigarette packs by preventing adhesive contact with fingers and smoking articles, maintaining product cleanliness and user convenience.
Implementation Method 1
a permanently tacky adhesive (PTA) layer 3, also called pressure-sensitive adhesive
Data Source
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AI summary
The present invention is related to a reclosable pack of smoking articles, said pack comprising a sealed enclosure having a front wall, a back wall, two side walls, a top-end wall and a bottom-end wall, said enclosure comprising a flexible packaging laminate around a bundle of smoking articles, the laminate consisting of an inner and outer film structures laminated to one another face-to-face via a layer of a permanent adhesive extending over the entire surface of the laminate, the laminate having a built-in easy-opening access comprising a permanently tacky adhesive sandwiched between the inner and outer film structures, said structures comprising an outer score line formed through the thickness of the outer layer structure and an inner score line formed through the thickness of the inner layer structure, both delimiting separable opening portions, in which a region of the outer opening portion between the outer and inner score lines is attached to an underlying surface of the inner structure via a permanently tacky adhesive, the permanently tacky adhesive layer is patterned and located on the surface delimited by the outer score line and the inner score line, the outer opening portion being peelable from the underlying surface of the inner layer structure to build an opening flap, and the outer opening portion being re-attachable to the underlying surface of the inner structure via said permanently tacky adhesive for reclosing, in use, the opening access, wherein the permanently tacky adhesive, in use, remains located after being peeled on the underlying surface of the inner structure.