Container Laser Marking for High-Contrast Recyclable Information
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Solution Overview
Problem
Current methods for displaying information on containers, such as PET bottles, face challenges in achieving high visibility and contrast without using ink or other impurities that can complicate recycling processes, and existing laser technologies struggle to maintain resolution and contrast due to beam spot diameter issues.
Innovation Solution
A method involving the formation of a first pattern composed of a collection of second patterns on the surface or inside of containers using laser processing, where the second patterns create a high diffusion property for ordinary light, enhancing contrast and visibility without applying impurities, and adjusting processing depth and beam diameter to optimize contrast and stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ink or impurities are used to display information on containers, then visibility and contrast are improved, but recycling processes become complicated and contamination occurs
Solution Approach 1:
The invention extracts and eliminates the harmful element (ink/impurities) from the information display process while maintaining the desired effect (visibility and contrast). Instead of applying external substances to the container surface, the method uses laser processing to directly modify the container material itself, creating visible patterns without any contaminating additives.
Solution Approach 2:
The container material itself serves as both the substrate and the medium for creating visible information. The laser processing induces changes in the container's own structure or properties (such as crystallization, color change, or surface modification) to generate high-contrast patterns, allowing the object to display information using its own inherent characteristics rather than external impurities.
2Manufacturing precision
If laser beam spot diameter is reduced to improve resolution, then manufacturing precision is improved, but beam intensity decreases and processing quality deteriorates
Solution Approach 1:
The invention employs periodic or pulsed laser action to deliver high peak power in short intervals. By using pulsed laser beams with appropriate duty cycles, the system achieves high instantaneous intensity for precise material modification while the average power remains manageable, allowing fine resolution patterns to be created without sacrificing processing quality.
Solution Approach 2:
The invention optimizes multiple laser parameters simultaneously (wavelength, pulse duration, repetition rate, focal position, and scanning speed) to achieve the desired balance between beam spot size and intensity. By adjusting these parameters in combination, the system can maintain high beam intensity even with smaller spot diameters, thereby achieving both high resolution and high processing 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 approach results in high-contrast, visually perceivable patterns with excellent visibility, even for large amounts of information, while avoiding the use of impurities that could contaminate recycling materials and maintaining a clean processing environment.
Implementation Method 1
heating or cooling the container before or after the forming of the information on the container
Implementation Method 2
forming information on the container by laser processing where the second patterns create a high diffusion property for ordinary light
Data Source
AI summary
A method for manufacturing a container product is disclosed. The method includes filling a container with contents; forming information on the container, the information including a number, a letter, and an image, the information being formed by a first pattern, the first pattern being made up of a collection of second patterns; and heating or cooling the container before or after the forming of the information on the container.