Fearless of disaster! Low-smoke halogen-free flame-retardant polyolefin heat-shrinkable marking tube remains clearly visible even in high temperatures
Publish Time: 2025-09-17
In modern industry, rail transit, power systems, data centers, and high-rise buildings, wires and cables serve as the building's "nervous system," carrying out critical tasks such as energy transmission and information exchange. Accurate, durable, and secure marking of these cables is fundamental to ensuring system maintainability, improving troubleshooting efficiency, and ensuring rapid emergency response. Traditional PVC marking tubes are prone to releasing toxic smoke and corrosive gases in extreme situations, such as fires, which not only endanger personnel but can also exacerbate equipment damage. Low-smoke halogen-free flame-retardant polyolefin heat-shrinkable marking tubes, with their superior safety performance and environmental friendliness, are becoming an indispensable "life marking" in high-end electrical engineering.1. "Silent Guardian" in Fires: Low-smoke, Halogen-Free, Protecting LifewaysIn the event of a fire, the combustion characteristics of the cable sheath and associated materials directly impact the efficiency of evacuation and rescue efforts. Traditional halogen-containing materials release large amounts of thick smoke and toxic hydrogen halide gases when exposed to high temperatures, causing a sudden drop in visibility, respiratory damage, and even secondary disasters. Low-smoke, halogen-free, flame-retardant polyolefin heat shrinkable marking tubes, however, utilize an environmentally friendly polyolefin base material that is free of halogens such as chlorine and bromine. They do not produce corrosive acidic gases when burned, and their smoke density is extremely low. This means that in an emergency, even if the marking tube burns, the spread of toxic smoke is minimized, buying valuable time for escape and firefighting operations.2. High-energy irradiation cross-linking: A stable physical structure even at high temperaturesOne of the core advantages of this marking tube lies in its high-energy electron beam irradiation cross-linking process. This process deeply cross-links the polyolefin molecular chains, transforming the material from a linear structure to a three-dimensional network, significantly improving its heat resistance, mechanical strength, and dimensional stability. The cross-linked heat shrink tubing maintains long-term stable operation over a wide temperature range of -45°C to 125°C and maintains structural integrity even under short-term high-temperature conditions, preventing melt dripping or severe deformation. Even in the heat of a fire's initial stages, the marking tube maintains a tight, shrunken fit, ensuring that critical information printed on it, such as wire and circuit numbers, remains clearly visible, providing a reliable basis for post-disaster investigation and repair.3. Flame-retardant and self-extinguishing, preventing the spread of fireThe low-smoke, halogen-free, flame-retardant polyolefin material possesses excellent flame retardancy, meeting vertical burn test standards such as IEC 60332-1. Once the fire source is removed, the material quickly self-extinguishes, effectively preventing the spread of flames along the cable bundle. This feature not only protects the marking information but also enhances the overall fire resistance of the wiring system from a system safety perspective. It is particularly suitable for locations with stringent fire safety requirements, such as subways, tunnels, hospitals, and airports.4. Professional Printing for Long-Lasting, Clear MarkingDesigned specifically for industrial marking printers, this heat shrink tubing features a specially treated surface that supports both ribbon and laser printing. The text and symbols remain crisp and clear, and are abrasion-resistant, solvent-resistant, and erasure-resistant. Even under prolonged use and challenging working conditions, the marking information remains resistant to fading or blurring. After shrinking, it tightly fits the cable, achieving a high shrinkage ratio of 3:1 or 4:1. It adapts to various wire diameters without wrinkling or deformation, ensuring uniform and aesthetically pleasing marking.5. Wide Application, Building a Safe Electrical EcosystemFrom the internal wiring harnesses of new energy vehicle battery packs to the wiring of high-speed rail control systems, from smart building distribution boxes to explosion-proof areas in the petrochemical industry, low-smoke, halogen-free, flame-retardant, heat-shrinkable marking tubing is widely used in fields requiring the highest safety and reliability. It serves not only as a "identity card" for cables but also as a "guardian" of the safe operation of the entire electrical system.In the pursuit of green, intelligent, and safe modern engineering systems, low-smoke halogen-free flame-retardant polyolefin heat-shrinkable marking tube redefines the standard for cable marking with its comprehensive advantages of environmental friendliness, safety, durability, and legibility. Leveraging the power of technology, it silently stands guard in the face of disaster, ensuring that critical information remains clearly visible even amidst blazes—the most robust detail guaranteeing industrial safety.
