Laser Marking Composition for High-Contrast Multi-Substrate Marks
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Solution Overview
Problem
Existing laser marking compositions are limited in their ability to form high-contrast marks on a variety of substrate materials, requiring different compositions for each material type, and laser marking on polymers lacks sufficient contrast without the use of additional substances.
Innovation Solution
A universal laser marking composition comprising enhancers such as nitrides, carbides, and silicides, along with mixed metal oxide pigments, transition metal oxides, silicate minerals, binders, solvents, and dispersants, which form high-contrast marks on metals, glass, ceramics, and plastics by absorbing laser radiation and chemically bonding to the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If different laser marking compositions are used for different substrate materials, then satisfactory marks can be formed on each specific material, but the complexity of the marking process increases and requires multiple compositions to be maintained
Solution Approach 1:
The patent develops a universal laser marking composition that can effectively mark multiple substrate materials including metals, glass, ceramics, and plastics with a single formulation. This composition achieves broad material compatibility while maintaining marking quality, eliminating the need to switch between different compositions for different materials.
Solution Approach 2:
The laser marking composition employs a composite formulation containing multiple components including metal powders, organic binders, and specialized additives. This composite structure enables the composition to adapt to different substrate types and laser parameters, providing versatile performance across various materials.
2Illumination intensity
If laser marking is performed directly on polymer materials without additional substances, then the process is simple, but the contrast and visibility of the marks are insufficient
Solution Approach 1:
The patent introduces a laser marking composition as an intermediary substance applied to polymer substrates before marking. This composition contains materials that enhance laser absorption and mark visibility, acting as a mediator between the laser beam and the polymer surface to achieve high-contrast marks.
Solution Approach 2:
The composition modifies the optical parameters of the polymer surface by incorporating materials with high laser absorption coefficients. This changes the interaction between laser radiation and the substrate, enabling effective marking with improved contrast and visibility.
3Reliability
If traditional laser marking compositions are used, then the process is straightforward, but the durability and adhesion of marks on certain substrates are limited
Solution Approach 1:
The patent applies a laser marking composition to the substrate surface before laser irradiation. This preliminary application ensures that the marking materials are pre-positioned on the substrate, facilitating strong adhesion and durable marks upon laser processing.
Solution Approach 2:
The composition includes metal powders and additives that enhance chemical reactions during laser marking, promoting strong bonding between the mark and substrate. These components facilitate accelerated oxidation and chemical bonding processes that improve mark durability and resistance to wear.
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 composition achieves high-contrast, durable laser marks on a wide range of materials using a single formulation, enhancing contrast and durability compared to traditional methods.
Implementation Method 1
the marking composition absorbs said laser radiation, increases in temperature
Implementation Method 2
exposing the marking composition to the laser radiation, the marking composition absorbs said laser radiation, increases in temperature
Implementation Method 3
permanently adheres to the substrate
Implementation Method 4
the irradiated portion of the marking composition permanently bonds to the substrate
Data Source
AI summary
Laser marking enhancers include nitrides, carbides, silicides, or combinations thereof, and are used in marking compositions and in compounded polymer materials. Upon disposing the marking compositions on a substrate and exposing the marking composition to laser radiation, the marking composition forms a mark on the substrate, which has a negative AL dark contrast value of at least -1 compared to a mark formed by the marking composition without the enhancer. Upon exposing the compounded polymer material to laser radiation, the irradiated portion of the compounded polymer material forms a mark in compounded polymer material. A lightness value difference (AL) between the mark and the non-irradiated portion of the compounded polymer material has an absolute value of at least 5, and the lightness value difference between the mark and the non-irradiated portion is greater than if the polymer material did not include the enhancer.