Top 10 insulated lunchboxesIn 2024, the top ten brands of insulated lunch boxes were Thermos, Tiger, ZOJILUSH, Supor, Lock&Lock, Tafuco, ASD, Joyoung, Fuguang, Hals, and so on. These brands on the list were well-known and powerful brands with good reputation.
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single-layer insulated cableSingle-layer insulated cable is a type of cable. In terms of specifications and models, for example, in the cross-linked polyolefin-insulated wires and cables with a rated voltage of 450/750V and below, they can be divided into six types according to the conductor type, such as the type of BYJ, BYJR, RYJ, BYJYJ, ryjyj, and RYJYJB. In terms of structural performance, the standard clearly stipulated the conductor, insulation, insulated wire core, sheath and marking of the cable, including the conductor structure, insulation mechanical performance, sheath mechanical performance and other aspects. Each set of tests included different small items, such as conductor structure, insulation mechanical performance, sheath mechanical performance, marking, insulated wire core withstand voltage, finished product withstand voltage, thermal extension, thermal contraction, low-temperature winding, low-temperature stretching, corrosiveness of burning gas. The specific test items such as electrical conductivity, cable combustion performance test, insulation resistance test, shield layer inspection, etc.
In terms of application classification, the wire and cable products used in the power system mainly include overhead bare wires, busbars (buses), power cables (including single-layer insulated cables and other types of cables, such as plastic cables, etc.), branch cables, electromagnetic wires, and electrical equipment wires and cables for power equipment. Different types of cables had different use codes, insulation codes, conductor material codes, etc. For example, the non-use code was power cable, the insulation code Z was oil-immersed paper, and the conductor material code was not marked as copper. In terms of cable composition, for example, there are many types of communication cables in the city. From the perspective of insulation, there are different types such as Y (Solid Polylene Insulating), YF (Foamed Polylene Insulating), YP (Foamed/Solid Polylene Insulating), etc. There are also many types of outer protective layers for cables, such as 23 for double-layer anti-corrosion steel tape wrapped with a single-layer thin steel wire armored PE layer.
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