Published: 2025-07-03 13:31:59
How to choose glossy polyurethane cables and PUR polyurethane cables
In the current booming fields such as industrial automation and intelligent equipment manufacturing, cables have become the key "lifeline" for equipment operation, with their performance directly affecting equipment stability and production efficiency. Glossy polyurethane cables and PUR polyurethane cables are highly favored in the market due to their outstanding characteristics. However, faced with a dazzling array of products, precise selection has become a focal point for many companies. This article will provide a detailed analysis of key selection points to help you select high-quality cables that are suitable for your needs.
1. Clarify application scenarios and performance requirements
(1) Industrial Automated Production Line
On automated assembly lines such as automotive manufacturing and 3C product production, equipment operates frequently, and cables must endure frequent bending and stretching. At this time, special attention must be paid to cable flexibility and tensile strength. Glossy polyurethane cables have smooth outer sheaths, reducing frictional resistance and lowering wear risk in complex wiring environments with multiple devices; PUR polyurethane cables, with their highly flexible conductor structures, can achieve flexible bending with small bending radii. For example, products from Shanghai cable companies meet the stringent requirement of a minimum bending radius of 5D (D is the cable outer diameter), and after 2 million bending tests, the structure remains stable, effectively ensuring long-term stable operation of automated production lines.
(2) Harsh environments such as oil stains and humidity
Industries such as food processing and shipbuilding often have work environments that involve oil and moisture. PUR polyurethane cables stand out for their excellent oil and water resistance. They have good resistance to mineral oils and unleaded gasoline, can be stored underwater for long periods, and the polyurethane material used for the outer sheath can withstand oil corrosion and moisture penetration, preventing internal short circuits and corrosion in the cable, thereby extending its service life. For example, in food processing plant conveyor belt systems, which frequently come into contact with oil and cleaning agents, using PUR polyurethane cables can reduce maintenance frequency and improve equipment reliability.
(3) Scenarios with high signal transmission requirements
In scenarios such as control systems and robot communications in smart factories, stable signal transmission is crucial. Some shiny polyurethane cables and PUR polyurethane cables use a double-shielded structure, such as an inner layer of aluminum foil shielding combined with an outer layer of tinned copper wire braided shielding, with a shielding coverage of up to 99.8%. This can effectively isolate high-frequency electromagnetic interference, static interference, and crosstalk between devices, ensuring accurate and fast transmission of control commands and feedback signals, avoiding equipment malfunctions caused by signal distortion, and meeting high-precision production requirements.
2. Focus on Key Performance Indicators of Cables
(1) Mechanical Properties
Tensile strength: Check whether high-strength fibers, such as aramid fibers, are added inside the cable. The aramid braided layer of high-quality products can distribute tensile forces of up to 500N or even higher, ensuring that the conductor does not break under significant pulling force and maintaining power and signal transmission.
Abrasion Resistance: For applications that frequently involve friction with rough surfaces, it is important to consider the abrasion resistance of the outer sheath. Polyurethane material itself is wear-resistant, but different formulations and processes can affect actual performance. Product abrasion test data, such as wear volume and number of abrasion cycles, can be referenced. For example, some PUR polyurethane cables treated with special processes have abrasion resistance that is more than 50% higher than ordinary cables.
(2) Electrical Performance
Insulation Performance: Insulation resistance is a key indicator; high insulation resistance can prevent leakage and short circuits. Common insulation materials such as cross-linked polyethylene (XLPE), after special processing, can greatly improve insulation performance, ensuring the cable operates safely under high voltage and complex electrical environments.
Signal Transmission Characteristics: For signal transmission cables, attention should be paid to parameters such as capacitance and delay. Low capacitance (e.g., capacitance per unit length ≤50 nF/km) can reduce signal attenuation, and low delay allows signals to respond quickly, meeting the requirements of automation equipment for signal transmission speed and stability.
(3) Weather resistance and chemical properties
Weather resistance: Consider the cable's performance under ultraviolet and extreme temperature conditions. Polyurethane materials have some weather resistance, but some products further enhance their weather resistance by adding anti-aging agents, allowing normal operation at extreme temperature differences from -40°C to 80°C, and long-term UV exposure is less likely to age or crack.
Chemical Resistance: Understand the cable's ability to resist common chemicals, such as whether it can maintain stable performance in acidic or alkaline environments. PUR polyurethane cables have good resistance to various solvents, acids, and bases, and can adapt to different chemical environments. However, different types of polyurethane (ether-based, ester-based) have differences in chemical resistance, so the choice should be based on the actual scenario.
3. Distinguishing Cable Types and Structures
(1) Classification by Purpose
Power transmission cable: Mainly used to supply power to equipment, focusing on parameters such as current-carrying capacity and voltage level. Cables of different specifications are suitable for different power devices, and selection should accurately match the rated power and operating voltage of the equipment to ensure stable power supply.
Signal transmission cables: Cables used to connect devices such as sensors and controllers, with a focus on shielding performance, signal transmission accuracy, and stability, ensuring that the signal is not interfered with or distorted during transmission.
(2) Classification by structure
Single-core and multi-core cables: Single-core cables are suitable for scenarios with low space requirements and small currents; multi-core cables can integrate multiple functions, such as transmitting power and signals simultaneously, and are suitable for situations where equipment wiring is complex and space is tight. The choice can be made according to the equipment wiring requirements.
Shielded and unshielded cables: In environments with strong electromagnetic interference, shielded cables must be used to ensure signal transmission quality; while in simple electromagnetic environments, where signals are not sensitive to interference, unshielded cables can meet the requirements and are relatively lower in cost.