Henan cable manufacturers: how to distinguish fake and inferior high-soft lines?

How to identify fake and shoddy high-soft lines in detail:

　　1, PVC sheath: the surface can be seen that the tight inner network has a periodic \ "unevenness of the city", indicating that the production process is good, not easy to occur relative sliding, is a good cable; The appearance is smooth, and it is not visible that it is stuck in the "unevenness of the net", and the hand pinching sheath has a loose feeling, which is a poor cable.

　　2, check the shielding layer network: the number of number is not enough, copper network, check malleability, electroplated tin copper core line scraping to see whether the inside of the copper core line, titanium magnesium aluminum alloy line strength is significantly higher than the copper core line; The mesh is sparse, unevenly distributed, and the insulation layer is too loose, etc. it is a poor cable.

　　3. Check the core wire: the diameter --- SYV cable is 0.78 to 0.8mm, and the SYWV cable is 1.0mm; Recently, there has been a SYV75-5 core diameter of 1.0mm cable, the characteristic impedance of this type of cable, there is no doubt that it is not 75 ohms, not used in the 75 ohm mother transmission system.

　　4. Check the adhesion between the core and the insulation layer: cut the insulation layer diagonally, open the core line according to the disengagement position, and see if the core wire and the insulation layer have raw materials for bonding processing technology; Good cables have great adhesion, and poor cables do not bond.

　　Vertical compressive strength test: take one meter of cable, peel off the core wire in layers, insulate layer, shield off layer, outer sheath, each leaving 10cm long.

　　The way is: both hands hold the adjacent double layer of the cable, driving in the opposite direction; Good cables generally can't be pulled out of energy, and poor cables can be easily pulled out without effort.