Transparent Adhesive Label With Opaque Barcode Zone
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Solution Overview
Problem
Transparent adhesive labels with barcodes or 2D codes printed in black on dark packaging backgrounds face low contrast issues, making them difficult for scanners to read, as the existing technologies do not effectively ensure readability of critical product information like barcodes or 2D codes.
Innovation Solution
A transparent adhesive label comprising superimposed layers of different materials, including a transparent film, a first color layer forming an opaque area, and a thermoreactive layer that turns black upon heat or UV exposure, allowing for clear machine-readable printing of barcodes or 2D codes using direct thermal printing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent adhesive label is used with black printing on dark packaging, then the label maintains transparency and aesthetic appearance, but the barcode contrast becomes low and scanning becomes difficult
Solution Approach 1:
The label is divided into two distinct areas: a transparent area for aesthetic printing and an opaque area for machine-readable barcode printing. This segmentation allows each area to serve its specific function optimally - the transparent area maintains the aesthetic appearance while the opaque area ensures high contrast for scanning, thereby resolving the contradiction between transparency and barcode readability without requiring complex additional structures.
Solution Approach 2:
Different regions of the label are assigned different optical properties: the transparent area allows light transmission for aesthetic purposes, while the opaque area blocks light to provide high contrast for barcodes. This local differentiation of quality enables the label to simultaneously achieve both transparency where needed and high contrast where required for scanning, effectively resolving the technical contradiction.
2Reliability
If a white opaque background is added to improve barcode readability, then scanning accuracy improves, but the label loses transparency and aesthetic appeal
Solution Approach 1:
The label surface is segmented into transparent and opaque zones. The opaque zone provides the white background necessary for high-contrast barcode printing and reliable scanning, while the transparent zone preserves the aesthetic transparency. This spatial segmentation allows both transparency and scanning accuracy to coexist without compromise.
Solution Approach 2:
The label exhibits local quality variation where the opaque area provides high reflectivity and contrast for reliable barcode reading, while the transparent area maintains light transmission for aesthetic purposes. This localized differentiation resolves the contradiction by ensuring each property is present only where functionally required.
3Ease of manufacture
If conventional printing methods are used on transparent labels, then the printing process is simple, but the barcode contrast on dark backgrounds remains insufficient
Solution Approach 1:
The printing process is segmented into two stages: first, the opaque area is created with its white background during label production, and second, the barcode is printed on this opaque background using standard thermal printing. This segmentation enables the use of simple conventional printing methods while ensuring high contrast, as the barcode is printed on the opaque white background rather than directly on transparent material over dark packaging.
Solution Approach 2:
The opaque background is prepared in advance during label manufacturing, creating a suitable substrate for subsequent barcode printing. This preliminary action ensures that when the barcode is printed using conventional methods, it automatically achieves high contrast on the opaque background, resolving the contradiction between printing simplicity and contrast sufficiency.
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 enables easily legible and machine-readable printing of information such as barcodes, weight, price, or expiry dates on the opaque area of the label, ensuring accurate scanning and readability even on dark backgrounds.
Implementation Method 1
the thermoresponsive layer turns black at the point where the heat is applied. After the heat has been applied, the thermo-reactive layer remains black. In one embodiment, the thermoresponsive layer is responsive to ultraviolet light and turns black where ultraviolet light is applied.
Data Source
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AI summary
The present invention relates to an adhesive label (11) comprising at least one transparent area and at least one opaque area (14). The label is constructed from superimposed layers of different materials, and the layers comprise at least one layer of transparent film (23), a first color layer (24) forming the opaque area (14), and a layer of adhesive material (25). The first color layer is arranged between the layer of adhesive material and the layer of transparent film (23).