How to choose terminal wire insulation material? What is the need for terminal wire insulation material? Let’s take a look at the performance and application scope of some commonly used PVC.PE.PP.XLPE.PU.TPE insulation materials in terminal lines.
Polyvinyl chloride (the most commonly used polyvinyl chloride line is 1.1430.1571) – polyvinyl chloride (polyvinyl chloride) plastic is a multi-component compound based on polyvinyl chloride epoxy resin. According to the regulations of various cables and wires, plastics, thickeners, fillers, flame retardants, production and processing additives (lubricating fluids), light stabilizers, additives and special main purpose additives are added to the secret formula of polyvinyl chloride. , mainly used for insulation and grommets (the key has four temperature levels: 126.96.36.199 degrees). Basic identification method: When ignited, the light yellow flame and the black smoke from the exhaust pipe have healthy and smelly flames at the bottom.
How to choose application terminal wire insulation material.
PE (often used by everyone) – high pressure polyethylene has good electrical insulation properties (relative dielectric constant and tangent of dielectric loss angle TG← are not large), good organic chemical reliability, low air permeability, and low water absorption capacity , small proportion, non-toxic, good plasticity, easy to produce and process. Mainly used for communication optical cable insulation layer. Basic identification method: the surface is bright, when lit, the flame is yellow and blue, with a slight smell of candles.
The appearance of PP-polypropylene is milky white crystalline solid, completely transparent, non-toxic, low water absorption capacity, only 0.03-0.04%, flammable. The proportion is 0.91, which is the smaller one among the common plastics at this stage. Mainly used for copper wire insulation. Basically, the identification method: the surface is smooth and the phase is very hard with PE. When lit, the flame is light yellow, dark blue, dripping, and has a slight smell of candles.
XLPE/XL-PVC-thermosetting plastic raw materials are mainly used for insulating layers, and the maximum high temperature resistance level of XLPE can reach 150. Basic identification method: cut a section of wire and remove the electrical conductor. Use fire gradually from the inside, then break the wire with force, and the cross section is very round.
PU-has good physical and chemical properties, and is commonly used in the grommets of electrode connecting wires and spring wires of machinery and equipment. Basic evaluation method: magnetic. Good ductility, swelling and dripping when ignited.
TPE/PO (thermoplastic rubber) – low smoke halogen free inhibitor.
Post time: Apr-21-2022