Which surface resistance value and friction voltage value is more valuable
When selling electrostatic products, customers often pay attention to the surface resistance value and friction voltage value of electrostatic products. In order to better implement electrostatic protection measures, some customers have not noticed the actual data of electrostatic products purchased ( Static value, voltage value), or just listen to the data that the supplier casually said, without substantial measurement, which will bring a series of uncertain factors to the production. If you purchase anti-static products for acceptance, there is a complete set of For testing instruments and testing processes, electrostatic protection has certain protection.
In factories in the electronics manufacturing industry, in order to ensure the quality of electronic products, every effort is made to do static protection, but if you do not have ESD personnel and static detection equipment in the purchase of anti-static products, how can you do static protection? What's more, each product has a certain validity period or service life, and anti-static products are no exception. Performing anti-static product performance testing is the top priority. Performance testing must have a complete testing instrument. What is the test result? Better electrostatic protection, rather than listening to others or seeing some paper-based test reports (test reports cannot represent all batches of items, only represent the product sent for inspection), not because of no value paper The report deceives itself, and it is the better method to detect physical objects in the field. With substantive data, it is only possible to do a good job of electrostatic protection.
At present, it is found that some customers have purchased many anti-static products and have never done a systematic test. However, they were PK disqualified as OEMs when they were inspected by the customer. It is a pity that if the customer conducts self-test before the customer is inspected, some of them are not Make rectifications in places that meet the requirements, so as not to lose the opportunity, for example: the production of anti-static wrist straps, the national standard requires a service life of six months, and requires regular testing during use, there may be no obvious appearance during use It is damaged or broken, but it is likely that the copper core wire in the wrist strap has been disconnected, and the static electricity cannot be discharged normally. It just happens to encounter the factory inspection. The problem can be large, which obviously causes serious losses to the enterprise.
You can find product quality problems by testing anti-static clothing. Many anti-static clothing on the market can pass the measurement of static resistance value (use electrostatic agent for surface treatment, the resistance value can temporarily reach the standard, and the acceptance of the goods is accepted, which is a terrible practice) , But the static voltage cannot be measured (the friction voltage is as high as 500V or more). There are many reasons. The main reason is the fabric. The market anti-static fabrics are uneven. Some anti-static fabrics are not woven with anti-static conductive wires at all. The black wire cannot be judged by the naked eye at all. It can only be measured with static testing equipment, and the workmanship is also particular. If the connection of the conductive wire is not good, the conductive performance will be reduced, and it will also have a certain impact on electrostatic protection. For anti-static clothing made of mesh fabrics for household use, the effect of discharging static electricity in horizontal and vertical directions with conductive wires is more ideal.