Introduction
Special cables can be resistant to high temperature, acid and alkali, anti-termite, and wire and cable used in ships, aircraft, nuclear power plants and other occasions. As far as classification is concerned, it does not belong to the same classification method as power, control, and computer cables. That is, the cables listed above also include special cables. Generally, special cables need to formulate enterprise internal control standards.
Special cables are a series of products with unique properties and special structures. Compared with ordinary wires and cables with a large quantity and a wide range, special cables have the characteristics of higher technical content, stricter use conditions, smaller batches, and higher added value. New materials, new structures, new processes and new design calculations are often used.
Classification
High temperature resistance
High temperature resistant wires and cables are needed in aerospace, locomotives, energy, steel, non-ferrous metal smelting, petroleum exploration, electrical machinery, construction and other fields. Long-term continuous working temperature 125 degrees, 135 degrees, 150 degrees, 180 degrees, 200 degrees, 250 degrees and 250 degrees above high temperature resistant wire and cable, commonly used are radiation cross-linked polyolefin, silicone rubber, fluororesin, polyimide Wire and cable such as amine, mica, magnesium oxide, etc. Now introduce; two new types of high temperature resistant wires and cables.
1. Polyethersulfone (PES) insulated wire
It has excellent heat resistance, physical and mechanical properties, electrical insulation properties, and extrusion molding properties, especially with outstanding advantages such as continuous use at high temperatures and stable performance in environments with rapid temperature changes: heat distortion temperature is 200 -220 degrees, continuous use temperature is 180-200 degrees, UL temperature index is 180 degrees; can withstand 150-160 degrees hot water or steam, and is not corroded by acids and alkalis at high temperatures; elastic modulus is -100-- 200 degrees Celsius is almost unchanged, especially above 100 degrees, better than any kind of thermoplastic resin; linear expansion coefficient is small, and its temperature dependence is also small; non-toxic, recognized by the US FDA, also in line with the Japanese Ministry of Health and Welfare No. 434 and Requirement of Announcement No. 178; It has self-extinguishing property, and has excellent flame retardancy without adding any flame retardant, and can reach UL94V-0 level (0.46mm).
2. Polyetheretherketone (PEEK) insulated wire
Polyetheretherketone is a super heat-resistant thermoplastic resin. The long-term continuous use temperature is 250 degrees, and the UL temperature index is 250 degrees.
PEEK is a flexible resin with good creep resistance. It is self-extinguishing and can reach UL94V-1 (thickness of 0.3mm), 94V-0 (thickness of 1.5mm), 94V-5 (thickness of 3.2mm) without any flame retardant.