Security Sticker with Partial-Depth Cutting Lines
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Solution Overview
Problem
Conventional stickers with cuts tend to deform or twist when removed from their backing, making it difficult to adhere smoothly to objects and causing security issues, such as unrecognized torn stickers or manufacturing defects.
Innovation Solution
A sticker design featuring cutting lines that only go through the top layer and stop at the adhesive layer, with guide cuts and connecting joints, allowing for easy tearing and maintaining the sticker's integrity, preventing unauthorized reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple cuts are provided on the sticker to form weakened portions for security purposes, then the sticker can be easily torn and damaged to prevent reattachment, but the sticker tends to deform or twist after removal from the backing, making it difficult to adhere smoothly to objects
Solution Approach 1:
The sticker is divided into multiple layers (top layer, middle layer, adhesive layer, backing layer) with cutting lines positioned specifically in the top layer. This segmentation allows the top layer to be torn along predetermined lines while the middle layer and adhesive layer remain intact, preventing the deformation and twisting problems that occur when the entire sticker is cut.
Solution Approach 2:
The cutting lines are designed to affect only specific portions of the sticker (the top layer) while leaving other portions (middle layer, adhesive layer, backing layer) unaffected. This local quality approach ensures that the security function is achieved through tearing the top layer, while the intact lower layers maintain the sticker's structural integrity and smooth adherence capability.
2Reliability
If cuts go through the entire sticker thickness, then the sticker is completely severed and cannot be reattached, but the sticker becomes difficult to remove from the backing and may tear irregularly
Solution Approach 1:
The cutting lines are segmented to extend only through the top layer and stop at the adhesive layer, rather than cutting through the entire sticker thickness. This partial segmentation allows the sticker to be easily removed from the backing while still achieving the security function of creating visible tear marks that prevent reattachment.
Solution Approach 2:
The cutting lines are pre-formed in the top layer to create predetermined weakened portions that will tear along specific paths during removal. This preliminary action ensures that when the sticker is pulled from the backing, it tears cleanly along the cutting lines rather than irregularly, making removal easier and more predictable.
3Reliability
If the sticker is completely cut through all layers, then security is maximized by preventing any reattachment, but the sticker cannot be smoothly transferred and adhered to objects
Solution Approach 1:
The sticker structure is segmented into multiple layers with cutting lines affecting only the top layer. This allows the sticker to maintain its overall shape and completeness during transfer, while the torn top layer provides visible security indicators. The intact middle layer and adhesive layer ensure smooth adherence to objects.
Solution Approach 2:
The solution moves from a two-dimensional approach (cutting through the entire flat sticker) to a three-dimensional layered approach, where cutting lines are positioned at a specific depth (only through the top layer). This dimensional change allows the sticker to maintain structural integrity and smooth shape for adherence, while still achieving security through the torn top layer.
Data Source
AI summary
A sticker includes a backing layer, a sticker body including a top layer and an adhesive layer, and a security arrangement cutting through the top layer only and being stopped at an adhesive layer to ensure the sticker body being completely removed from the backing layer without tearing the top layer apart. The security arrangement includes a plurality of lead edge notches evenly provided along the outer flange of the top layer, and a cutting line structure formed at the top layer. After the sticker body is completely removed from the backing layer and is applied for sticking on an object surface, the sticker body becomes a self-destructive layer by the security arrangement to be torn apart at the time when the sticker body is removed from the object surface so as to ensure the sticker body being unable to be removed completely from the object surface.