The Role of Antistatic Equipment
---Antistatic work clothes are used to effectively release static charge from the operator's body.---Antistatic tweezers effectively discharge static charge.
---Wearing antistatic work shoes is the most effective and reliable method for discharging static charge from the operator's body. Surface resistance: 10⁶-10⁸ ohms---Wearing antistatic gloves prevents the operator's fingers from directly contacting static-sensitive components and safely discharges static charge from the operator's body. 10⁸-10⁹ ohms---Antistatic finger cots effectively prevent fingertip discharge. 10⁶-10¹¹ ohms---Antistatic wrist straps are devices worn on the wrist to release accumulated static charge from the body. The reason is that static electricity from the human body is discharged to the ground through the wrist strap and grounding wire. Therefore, the wrist strap must be in proper contact with the skin during use, and the grounding wire must be directly grounded, ensuring a grounding resistance of 106 ohms. --- The anti-static table mat has a two-layer structure: an upper layer for static dissipation and a lower layer for conductivity, effectively dissipating static charge.
--- Anti-static transparent mesh curtains are made of transparent and static dissipative materials, providing clear transparency and static dissipation. 109-1011 ohms
--- Anti-static chairs: Eliminate static electricity from the operator's body, effectively improving productivity.
---Anti-static component boxes effectively discharge static charge---Anti-static trolleys effectively discharge static charge---Ionizing air guns: quickly eliminate static electricity and clean products. Grounding wires for table mats, grounding sockets for anti-static straps, and grounding wires for ordinary table mats are all around us. To truly prevent static electricity, we need to start with small things, such as wearing work clothes, masks, and anti-static gloves; always wearing anti-static straps; ensuring ion fans are always running at maximum capacity and in good working order; checking that anti-static wires on tools and molds are properly connected; ensuring 5S practices are followed on workbenches; checking that all material handling carts have grounding wires; and checking that the stools we sit on are grounded. These seemingly simple tasks play a crucial role in protecting our products. We urge everyone to pay close attention; a moment's carelessness could render all the hard work of the entire production line futile, and a single damaged product could represent half a month's wages. Think about the preciousness of something you bought with half a month's salary; our products are no different. We must hold ourselves to high standards, starting with the smallest details, to do our work better and minimize the harm of static electricity to our products.
1. Flooring Materials
a. Direct use of wooden floors or laying wool, hemp, synthetic fiber carpets, or ordinary floor coverings is prohibited.
b. Flooring made of static-conducting materials should be used, such as anti-static raised floors or anti-static mats laid on ordinary floors, with effective grounding.
c. The use of specially treated terrazzo floors is permitted, such as by pre-laying a grounding mesh, carburizing, or spraying an anti-static agent onto the floor.
2. Grounding
a. The anti-static system must have an independent and reliable grounding device. The grounding resistance should generally be less than 10Ω, and the installation and testing methods should comply with GBJ97 requirements.
b. The anti-static grounding wire must not be connected to the power supply neutral wire and must not be shared with the lightning protection grounding wire.
c. When using a three-phase five-wire power supply, the earth wire can be used as the anti-static grounding wire (but the neutral and ground wires must not be mixed).
d. The cross-sectional area of the main grounding line should not be less than 100mm²; the cross-sectional area of the branch lines should not be less than 6mm²; the grounding wires for equipment and workbenches should use multi-strand plastic-coated conductors with a cross-sectional area of not less than 1.25mm², and the grounding wire color should preferably be yellow-green.
e. The connection method for the main grounding line should be brazing.
f. The connection terminals of the anti-static equipment should ensure reliable contact and easy installation and removal. Various clamp-type connectors such as handle clips and plug sockets are permitted.
3. Ceiling Materials: Antistatic materials should be used for ceilings. Generally, gypsum board is permitted, but ordinary plastic products are prohibited.
4. Wall Coverings: Antistatic wallpaper should be used for walls. Generally, gypsum paint or lime paint is permitted, but ordinary wallpaper and plastic wallpaper are prohibited.
5. Humidity Control: a. The relative humidity of the antistatic work area should ideally not be lower than 50%.
a. Humidifiers may be used to spray humidifiers or water to increase ambient humidity, provided it does not cause harmful effects on the products.
b. The humidity in computer rooms should comply with the relevant provisions of GB2887, and similar computer rooms should also comply with this provision.
6. Area Boundaries: Antistatic work areas should be clearly marked with boundaries and warning signs should be prominently displayed. Warning signs should comply with GJB1649. An ionized air bath should be installed at the entrance to the work area.
7. Charge Sources: The use and contact with charge sources that easily generate static charge are prohibited within the antistatic work area.