How is the grade of anti-static work clothes defined?
Static electricity is a big invisible killer in industrial production. It is invisible but can not be ignored. Although not all industries need antistatic, it is inseparable in the electronics industry, pharmaceutical industry, petrochemical industry, food industry, aerospace, etc. Anti-static work clothes. Different industries have different requirements for antistatic work clothes, and the grades have also been divided. Today, let's work with you to understand how the grades of antistatic work clothes are defined.
In people's understanding, it seems that A-class antistatic work clothes are conductive silk anti-static work clothes, while B-class anti-static work clothes are polyester-cotton anti-static work clothes, but this is actually not the case. In the national standard GB12014-2009 for anti-static work clothes The A and B grades are divided from the surface resistivity. In the national standard, the surface resistance of grade A antistatic work clothes is 10 to the 5th to 10 ohms, and the surface resistance of grade B antistatic work clothes is 10 7th power to 10th power of 10 ohms, but when the surface resistivity of the antistatic workwear reaches 10th power of 10 ohms, the antistatic workwear is a class B antistatic workwear.
In addition, Class A antistatic work clothes can be washed more than a hundred times, and the friction voltage (except for special customization) is about 200V. Class B antistatic work clothes are cleaned about 50 times, and the friction voltage is about 300V.