Laser-Markable Black PE Cable Sheath Material for Clear Contrast Coding
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Solution Overview
Problem
Existing methods for marking black PE materials in the cabling industry, such as traditional ink jet coding and printing, suffer from issues like blurred marks, poor contrast, and slow marking speed, particularly on small-sized cables with thin wall thicknesses.
Innovation Solution
A high-efficiency laser marking material composed of specific ratios of HDPE and LLDPE resins, laser additives, lubricants, antioxidants, and black masterbatch, which enhances laser absorption and foaming to achieve clear, high-contrast markings without affecting the wire or cable performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional laser marking materials (gold, silver, platinum, copper) are used, then good laser marking effect is achieved, but high cost and potential harm to human body and environment are caused
Solution Approach 1:
The patent changes the material composition parameters by incorporating specific metal particles (gold, silver, platinum, copper) within a polymer matrix, creating a composite material that maintains laser marking performance while reducing harmful effects through controlled material composition and distribution
Solution Approach 2:
The patent creates a composite material system combining polymer base material with metal particles, achieving both the desired laser marking effect and reduced harm by leveraging the complementary properties of each material component
2Manufacturing precision
If conventional laser marking materials are used, then good laser marking effect is achieved, but high cost is incurred
Solution Approach 1:
The patent uses composite materials combining inexpensive polymer base materials with small amounts of metal particles, achieving good laser marking effects at lower cost by replacing expensive pure metal materials with cost-effective composites
Solution Approach 2:
The patent optimizes the concentration and distribution parameters of metal particles within the polymer matrix, achieving sufficient laser marking performance with reduced material costs through controlled composition parameters
3Manufacturing precision
If laser marking is performed on certain materials, then marking is achieved, but material surface is damaged or material is lost
Solution Approach 1:
The patent uses the polymer base material as an intermediary carrier that allows laser energy to be absorbed and converted into localized heating, enabling marking without direct damage to the underlying substrate material while the metal particles serve as heat absorption mediators
4Manufacturing precision
If existing laser marking materials are used, then marking effect is achieved, but the materials cannot be reused or recycled
Solution Approach 1:
The patent designs the composite material structure to enable recovery and reuse of the polymer matrix and metal particles, allowing the marking material to be discarded as a whole unit that can be collected and reused, reducing material loss and improving sustainability
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 material enables high-speed, clear, and high-contrast laser marking on black PE materials with superior processing performance, good weather resistance, and long service life, maintaining mechanical properties and ensuring the printed fonts remain intact under various conditions.
Implementation Method 1
the polymer base material and the metal particles in the marking material can absorb the laser beam
Implementation Method 2
when the marking material is irradiated by a laser beam, the polymer base material and the metal particles in the marking material can absorb the laser beam
Data Source
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AI summary
A laser-markable material for coating of outdoor cables includes mass percentages of 40-80wt% HDPE resin and 20-60wt% LLDPE resin. A laser assistant selected from a group consisting of ferroferric oxide, antimony tin oxide, and mica copper phosphate is also added, together with a lubricant, antioxidant, light stabilizer, and black masterbatch. In the formulation, additional amounts of laser auxiliary agent and black masterbatch increase the quality of printing. An increase of laser additives and decrease of carbon black improves the quality of laser printing but has little effect on the mechanical properties of the material. Laser additives also improve absorption of the special wavelengths emitted by the laser, carbonizing the polymer surface layer of black PE, and through foaming, a white color is revealed in sharp contrast with the underlying black PE sheath. A method for making same is also disclosed.