Magnetisable Ink for Packaging Register Marks
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Solution Overview
Problem
Existing packaging laminates require significant area for optical register marks, which can be misaligned with other operations, and there is a need for an alternative method to provide guiding marks that do not interfere with packaging design and are precise.
Innovation Solution
A magnetisable ink comprising magnetisable particles, a solvent, and a binder is used to create magnetic markings on packaging laminates, allowing for high-speed printing of magnetisable portions on the interior-facing surface of packaging materials, such as paper or paperboard, using maghemite or hematite particles and additives like waxes and antifoaming agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical register marks are used for guiding operations on packaging laminate, then alignment guidance is provided, but significant area is consumed and misalignment with other operations may occur
Solution Approach 1:
The patent replaces optical register marks with magnetisable portions that can be detected by magnetic sensors. This substitution eliminates the need for large visible marks while maintaining precise alignment guidance through magnetic field detection, thereby reducing area consumption while preserving manufacturing precision.
Solution Approach 2:
The invention transitions from visual/optical detection to magnetic property detection. The magnetisable portions exhibit distinct magnetic characteristics that can be detected by sensors, replacing the need for large optical marks and reducing the area required for registration purposes.
2Manufacturing precision
If optical register marks are used for guiding operations, then alignment guidance is provided, but reliance on printing alignment with other operations is required
Solution Approach 1:
The patent replaces optical detection systems with magnetic detection systems. Magnetic sensors can directly detect the magnetisable portions without relying on visual alignment or complex printing registration processes, thereby reducing process complexity while maintaining alignment precision.
3Productivity
If magnetisable ink is printed at high speed on packaging laminate, then productivity is improved, but printing quality and particle dispersion may be compromised
Solution Approach 1:
The patent uses a composite ink formulation containing magnetisable particles suspended in a binder system specifically designed for high-speed printing. The binder composition and particle size distribution are optimized to maintain uniform dispersion and printing quality even at high printing speeds, thereby achieving both productivity improvement and quality maintenance.
Solution Approach 2:
The invention optimizes parameters such as particle size (0.1-2.5 μm), binder composition (20-60% by weight), and solvent selection to enable high-speed printing while maintaining printing quality. These parameter changes allow the ink to be applied rapidly without compromising the uniformity of particle distribution or the overall printing quality.
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 magnetisable ink enables precise and efficient magnetic marking on packaging materials, reducing area consumption and alignment issues, while ensuring compatibility with food packaging and maintaining printing quality.
Implementation Method 1
the ink comprises magnetisable particles such that magnetic marking is enabled
Data Source
Figure 1
AI summary
A magnetisable ink suitable for a packing material for forming food packages is disclosed. The ink comprises magnetisable particles; a solvent; and a binder.