Anti-static wrist strap
1. Introduction of anti-static wrist strap
Anti-static wrist strap is a kind of wrist strap worn by workers on the wrist to discharge body static electricity. It is commonly used in the production line of electronic products. Divided into corded and cordless.
2. Anti-static wrist strap
Anti-static wrist strap It is composed of elastic band, movable button, spring cord, protective resistor and plug or chuck. The inner layer of the elastic band is woven with anti-static yarn, and the outer layer is woven with ordinary yarn. Wear it on your wrist, fasten the snap, and the other end of the plug or chuck is grounded, so that the static electricity of the body can be effectively discharged.
Three, anti-static wrist strap matters needing attention
After using the anti-static wrist strap for a period of time, due to the continuous stretching and bending of the wrist strap during this process, the metal wires in some cheap wrist straps will break off and will not have the anti-static effect. After contacting with sensitive components again, it will cause parts to be broken down or even scrapped.
The service life of the anti-static wrist strap depends on the life of the ground terminal. Generally, the best domestic anti-static metal wrist strap is bent about 60,000 times and imported 60,000 to 100,000 times. However, domestic wristbands have many problems. For example, elastic wristbands are easy to wear and the tightness of the connecting parts is not enough. The imported ones can be used for at least two years.
Fourth, anti-static wrist strap selection skills
1. The inner layer of the wrist part of a good anti-static wrist strap is made of silver wire, the more turns, the better the conductivity;
2. The wrist strap connecting PU line is stronger than PVC line and has better resilience;
3. The internal material of the ground wire, preferably copper wire;
4. The number of bending times of the connection part of the grounding wire and the wrist strap can be tested by the corresponding instrument. If there is no user of the testing instrument, it is recommended to obtain the corresponding third-party testing report from the purchaser.