Electrical tape full name is polyvinyl chloride electrical insulation adhesive tape, also known as electrical insulation tape or insulating tape. Electrical tape is suitable for insulation of various resistance parts. General electrical insulation tape has 3 kinds, one kind is insulation black tape, the second kind is PVC electrical flame retardant tape, the third kind is high pressure self-adhesive tape, three kinds have the function each. When electrical insulation tape of choose and buy, how to judge the stand or fall of electrical insulation tape?
Black tape insulation
It only has the function of insulation, but it is not flame retardant or waterproof. Now it has been gradually phased out, and it is still used in some civil buildings.
PVC electrical flame retardant tape
It has insulation, flame retardant, and waterproof three functions, but because it is PVC material, so the ductility is poor, can not wrap the joint is very tight, waterproof is not very ideal, but it has been widely used.
High pressure self-adhesive tape
Generally used in the higher grade of voltage, because of its good ductility, waterproof than the second is better, so people also use it in the field of low pressure, but because of its strength is not as good as PVC electrical flame retardant tape, usually the two combined use.
Electrical tape quality discrimination from the outside first to see whether there is a defect, tape rewinding whether to stick, cut have burred edge, whether smooth to see tape material (electrical insulation tape has a lot of types, not one introduced material quality evaluation, in most cases still have to see the use of). Look at the glue, now most of the glue has evolved to environmental protection, taste is very important, if very strong, is the possibility of defective (not to point to all the tape), in the tape is pulled down to use when there is no anti-adhesive, after use tear off there is no residual glue, if the residual glue in the product, this is the fatal point of defective tape.
Note: PVC material is basically the same, mainly to see the glue, poor quality of the tape wrapped after a period of time, then untangle, can see the glue and PVC material separation, looks sticky, very uncomfortable, and good quality tape will not appear this problem.